This layer contains the 2021 Official Supervisorial District Boundary for the County of Los Angeles, per Assessor parcels and the Department of Public Works' City/Community boundaries. Supplemental Information: Adopted December 15, 2021 - The County of Los Angeles Citizens Redistricting Commission’s Redistricting Plan adjusting the Official Supervisorial District Boundary for the County of Los Angeles pursuant to Elections Code Sections 21530 et seq. See Resolution No. 2021-04, Resolution of the County of Los Angeles Citizens Redistricting Commission Adopting a Redistricting Plan for the Los Angeles County Supervisorial Districts pursuant to Elections Code Section 21530 et seq.and Resolution No. 2021-05, Resolution of the County of Los Angeles Citizens Redistricting Commission Adopting a Redistricting Report for the Los Angeles County Supervisorial Districts pursuant to Elections Code Section 21534, subd. (d)(3). Per Sec. 21531 of the California Elections Code, Supervisorial District boundaries in the County of Los Angeles are adjusted in the year following the year in which the decennial federal census is taken. Published in the County Code under Title 1, Chapter 1.08, are boundary descriptions for the Supervisorial Districts.Last Updated: 3/4/2022

This application provides users with access to download PDF maps of the Supervisorial Districts (countywide or by district) in various sizes. These maps were created by the Survey Mapping Property Management team in Public Works, and are meant for informational purposes only.

This layer contains the 2011 Official Supervisorial District Boundary for the County of Los Angeles, drawn at the parcel level, per Assessor parcels and the County Cadastral Landbase.Supplemental Information: Adopted September 27, 2011 – Another entry on this portal includes redistricting information from the Districts’ adoption in 2011, along with boundaries drawn at the TIGER street map level. Per Sec. 21500 of the California Elections Code, Supervisor District boundaries are adjusted following each decennial federal census. Published in the County Code under Title 1, Chapter 1.08, boundary descriptions are based on census tracts and city boundaries at the time of adoption.Metes and Bounds descriptions were prepared by the Department of Public Works.2010 Census Blocks provide more information and GIS data downloads on this portal. Census tracts listed in the County Code correspond to the first six digits of the GIS attribute CTCB10.City Boundaries and City Annexations provide current and historical legal city boundary information on this portal.

Supervisorial District Boundaries (1981) as derived from a scanned map. This layer was developed for informational and referential purposes, and for general investigation and analysis of district histories. The data may also be used for general cartographic purposes. It should not be used for legal questions.The data from was digitized from scanned and rectified County Engineer maps provided by the Department of Public Works.Click here to view and download the scanned/rectified map as a .tif file

Supervisorial District Boundaries (1971) as derived from a scanned map. This layer was developed for informational and referential purposes, and for general investigation and analysis of district histories. The data may also be used for general cartographic purposes. It should not be used for legal questions.The data was digitized from scanned and rectified County Engineer maps provided by the Department of Public Works.Click here to view and download the scanned/rectified map as a .tif file

This web map shows the major boundary differences of Los Angeles County 2021 Supervisorial District boundaries and 2011 supervisorial district boundaries.2021 Supervisorial District boundaries was adopted on December 15, 2021. 2011 Supervisorial District boundaries was adopted on September 27, 2011.How is this data created?This data is created by intersecting 2021 Supervisorial District boundary with 2011 Supervisorial District boundary and select only the major boundary change polygons.

This layer contains the 1991 official Supervisorial District Boundary for the County of Los Angeles, digitized from scanned maps. It was developed to provide reference for earlier supervisorial districts, and is not tied to parcels.

This application provides users with access to download PDFs of Community Profiles (for LA County, unincorporated and city areas), as well as maps of LA County Supervisorial Districts in various page sizes and detail. The Supervisorial maps reflect the district boundaries established on December 15, 2021 by the County of Los Angles Citizens Redistricting Commission.These maps were created by the Survey Mapping Property Management team in Public Works, and are meant for informational purposes only.

Summarized to Supervisorial Districts from census tracts.For source data: https://data.census.gov/table?tid=ACSDT5Y2022.B21005For more information about this dataset, please contact egis@isd.lacounty.gov

The Los Angeles County Flood Control District (District) was established in 1915 and encompasses approximately 2,758 square miles. The District operates and maintains one of the most complex systems of flood control and water conservation in the Country. The District’s current infrastructure includes 14 major dams and reservoirs, 483 miles of concrete and soft-bottom channels, 3,380 miles of underground storm drain conduits, 82,275 catch basins, 48 pump stations, 173 debris basins, 181 crib dams, 29 sediment placement sites, 27 spreading grounds, 21 low-flow diversion structures, 3 seawater barrier systems with 290 seawater barrier injection wells, 1 constructed wetland, and 1 mitigation bank area. Employees of the Los Angeles County Public Works (PW) serve as staff for the District. The District is separate from PW and funds of each entity remain in separate accounts. PW pays the District for the use of District equipment, materials and property used for County purposes. The District is empowered to carry out the objectives of the Los Angeles County Flood Control Act of 1915, California Water Code, Appendix, Chapter 28 (the Act). The objectives are to provide for the control and conservation of flood, storm and other wastewater and to protect from damage such as flood or storm waters, the harbors, waterways, public highways and property within the District. These powers are exercised by the County Board of Supervisors (Board), which acts as the governing body of the District. The duties of the Board include approving the District’s budget, determining the District’s tax rates, approving contracts, and determining when to issue bonds authorized by the voters of the District.

Legislative District web map application is created to review and visualize current LA County legislative districts in an interactive way. This web map application includes Supervisorial Districts 2021, US Congressional Districts, California State Senate Districts and State Assemble Districts. The data source is the LA County eGIS Repository. This web map layer also includes county boundary as well as countywide statistical area (CSA) boundary and city/community names.

The LA County 2021 Redistricting WebApp provides an interactive platform that allows users to explore the changes in supervisorial district boundaries between the 2010 and 2020 redistricting efforts. The app visually compares the old and new district maps, highlighting shifts in geographic adjustments and the impact on political boundaries. Users can toggle between the 2010 and 2020 maps to see how population changes and community needs influenced the redrawing of district lines, ensuring fair and equitable representation across the county.

Supervisorial Districts (1991)

Contains precincts from the Los Angeles County Registrar/Recorder’s Office. The Registrar/Recorder uses these precincts to run elections by grouping them into election precincts, so they capture the boundaries of all voting districts in the County, including, but not limited to: LA County Supervisorial Districts US Congressional Districts State Senate and Assembly Districts Schools Districts Water and Waste Districts See more: http://egis3.lacounty.gov/dataportal/2012/12/20/2012-precincts-as-of-march-9th/

Voting precincts in the City of LA. Data comes from the Los Angeles County Registrar/Recorder’s Office. The Registrar/Recorder uses these precincts to run elections by grouping them into election precincts, so they capture the boundaries of all voting districts in the County, including, but not limited to: LA County Supervisorial Districts US Congressional Districts State Senate and Assembly Districts Schools Districts Water and Waste Districts See more at egis3.lacounty.gov

IntroductionThis metadata is broken up into different sections that provide both a high-level summary of the Housing Element and more detailed information about the data itself with links to other resources. The following is an excerpt from the Executive Summary from the Housing Element 2021 – 2029 document:The County of Los Angeles is required to ensure the availability of residential sites, at adequate densities and appropriate development standards, in the unincorporated Los Angeles County to accommodate its share of the regional housing need--also known as the Regional Housing Needs Allocation (RHNA). Unincorporated Los Angeles County has been assigned a RHNA of 90,052 units for the 2021-2029 Housing Element planning period, which is subdivided by level of affordability as follows:Extremely Low / Very Low (<50% AMI) - 25,648Lower (50 - 80% AMI) - 13,691Moderate (80 - 120% AMI) - 14,180Above Moderate (>120% AMI) - 36,533Total - 90,052NOTES - Pursuant to State law, the projected need of extremely low income households can be estimated at 50% of the very low income RHNA. Therefore, the County’s projected extremely low income can be estimated at 12,824 units. However, for the purpose of identifying adequate sites for RHNA, no separate accounting of sites for extremely low income households is required. AMI = Area Median IncomeDescriptionThe Sites Inventory (Appendix A) is comprised of vacant and underutilized sites within unincorporated Los Angeles County that are zoned at appropriate densities and development standards to facilitate housing development. The Sites Inventory was developed specifically for the County of Los Angeles, and has built-in features that filter sites based on specific criteria, including access to transit, protection from environmental hazards, and other criteria unique to unincorporated Los Angeles County. Other strategies used within the Sites Inventory analysis to accommodate the County’s assigned RHNA of 90,052 units include projected growth of ADUs, specific plan capacity, selected entitled projects, and capacity or planned development on County-owned sites within cities. This accounts for approximately 38 percent of the RHNA. The remaining 62 percent of the RHNA is accommodated by sites to be rezoned to accommodate higher density housing development (Appendix B).Caveats:This data is a snapshot in time, generally from the year 2021. It contains information about parcels, zoning and land use policy that may be outdated. The Department of Regional Planning will be keeping an internal tally of sites that get developed or rezoned to meet our RHNA goals, and we may, in the future, develop some public facing web applications or dashboards to show the progress. There may even be periodic updates to this GIS dataset as well, throughout this 8-year planning cycle.Update History:1/7/25 - Following the completion of the annexation to the City of Whittier on 11/12/24, 27 parcels were removed along Whittier Blvd which contained 315 Very Low Income units and 590 Above Moderate units. Following a joint County-City resolution of the RHNA transfer to the city, 247 Very Low Income units and 503 Above Moderate units were taken on by Whittier. 10/16/24 - Modifications were made to this layer during the updates to the South Bay and Westside Area Plans following outreach in these communities. In the Westside Planning area, 29 parcels were removed and no change in zoning / land use policy was proposed; 9 Mixed Use sites were added. In the South Bay, 23 sites were removed as they no longer count towards the RHNA, but still partially changing to Mixed Use.5/31/22 – Los Angeles County Board of Supervisors adopted the Housing Element on 5/17/22, and it received final certification from the State of California Department of Housing and Community Development (HCD) on 5/27/22. Data layer published on 5/31/22.Links to other resources:Department of Regional Planning Housing Page - Contains Housing Element and it's AppendicesHousing Element Update - Rezoning Program Story Map (English, and Spanish)Southern California Association of Governments (SCAG) - Regional Housing Needs AssessmentCalifornia Department of Housing and Community Development Housing Element pageField Descriptions:OBJECTID - Internal GIS IDAIN - Assessor Identification Number*SitusAddress - Site Address (Street and Number) from Assessor Data*Use Code - Existing Land Use Code (corresponds to Use Type and Use Description) from Assessor Data*Use Type - Existing Land Use Type from Assessor Data*Use Description - Existing Land Use Description from Assessor Data*Vacant / Nonvacant – Parcels that are vacant or non-vacant per the Use Code from the Assessor Data*Units Total - Total Existing Units from Assessor Data*Max Year - Maximum Year Built from Assessor Data*Supervisorial District (2021) - LA County Board of Supervisor DistrictSubmarket Area - Inclusionary Housing Submarket AreaPlanning Area - Planning Areas from the LA County Department of Regional Planning General Plan 2035Community Name - Unincorporated Community NamePlan Name - Land Use Plan Name from the LA County Department of Regional Planning (General Plan and Area / Community Plans)LUP - 1 - Land Use Policy from Dept. of Regional Planning - Primary Land Use Policy (in cases where there are more than one Land Use Policy category present)*LUP - 1 (% area) - Land Use Policy from Dept. of Regional Planning - Primary Land Use Policy (% of parcel covered in cases where there are more than one Land Use Policy category present)*LUP - 2 - Land Use Policy from Dept. of Regional Planning - Secondary Land Use Policy (in cases where there are more than one Land Use Policy category present)*LUP - 2 (% area) - Land Use Policy from Dept. of Regional Planning - Secondary Land Use Policy (% of parcel covered in cases where there are more than one Land Use Policy category present)*LUP - 3 - Land Use Policy from Dept. of Regional Planning - Tertiary Land Use Policy (in cases where there are more than one Land Use Policy category present)*LUP - 3 (% area) - Land Use Policy from Dept. of Regional Planning - Tertiary Land Use Policy (% of parcel covered in cases where there are more than one Land Use Policy category present)*Current LUP (Description) – This is a brief description of the land use category. In the case of multiple land uses, this would be the land use category that covers the majority of the parcel*Current LUP (Min Density - net or gross) - Minimum density for this category (as net or gross) per the Land Use Plan for this areaCurrent LUP (Max Density - net or gross) - Maximum density for this category (as net or gross) per the Land Use Plan for this areaProposed LUP – Final – The proposed land use category to increase density.Proposed LUP (Description) – Brief description of the proposed land use policy.Prop. LUP – Final (Min Density) – Minimum density for the proposed land use category.Prop. LUP – Final (Max Density) – Maximum density for the proposed land use category.Zoning - 1 - Zoning from Dept. of Regional Planning - Primary Zone (in cases where there are more than one zone category present)*Zoning - 1 (% area) - Zoning from Dept. of Regional Planning - Primary Zone (% of parcel covered in cases where there are more than one zone category present)*Zoning - 2 - Zoning from Dept. of Regional Planning - Secondary Zone (in cases where there are more than one zone category present)*Zoning - 2 (% area) - Zoning from Dept. of Regional Planning - Secondary Zone (% of parcel covered in cases where there are more than one zone category present)*Zoning - 3 - Zoning from Dept. of Regional Planning - Tertiary Zone (in cases where there are more than one zone category present)*Zoning - 3 (% area) - Zoning from Dept. of Regional Planning - Tertiary Zone (% of parcel covered in cases where there are more than one zone category present)*Current Zoning (Description) - This is a brief description of the zoning category. In the case of multiple zoning categories, this would be the zoning that covers the majority of the parcel*Proposed Zoning – Final – The proposed zoning category to increase density.Proposed Zoning (Description) – Brief description of the proposed zoning.Acres - Acreage of parcelMax Units Allowed - Total Proposed Land Use Policy UnitsRHNA Eligible? – Indicates whether the site is RHNA Eligible or not. NOTE: This layer only shows those that are RHNA Eligible, but internal versions of this layer also show sites that were not-RHNA eligible, or removed during the development of this layer in 2020 – 2022.Very Low Income Capacity - Total capacity for the Very Low Income level as defined in the Housing ElementLow Income Capacity - Total capacity for the Low Income level as defined in the Housing ElementModerate Income Capacity - Total capacity for the Moderate Income level as defined in the Housing ElementAbove Moderate Income Capacity - Total capacity for the Above Moderate Income level as defined in the Housing ElementRealistic Capacity - Total Realistic Capacity of parcel (totaling all income levels). Several factors went into this final calculation. See the Housing Element (Links to Other Resources above) in the following locations - "Sites Inventory - Lower Income RHNA" (p. 223), and "Rezoning - Very Low / Low Income RHNA" (p231).Income Categories - Income Categories assigned to the parcel (relates to income capacity units)Lot Consolidation ID - Parcels with a unique identfier for consolidation potential (based on parcel ownership)Lot Consolidation Notes - Specific notes for consolidationConsolidation - Adjacent Parcels - All adjacent parcels that are tied to each lot consolidation IDsShape_Length - Perimeter (feet)Shape_Area - Area (sq feet)*As it existed in 2021

On December 6, 2022, the Los Angeles County Board of Supervisors (BOS) adopted the 2022 Countywide Parks Needs Assessment Plus (PNA+) Final Report. Consistent with this Board action, DPR is making GIS data from the PNA+ available to the public here. Composite layers include:Regional Study AreasRural Study AreasRegional Site InventoryLocal ParksBeachesCountywide TrailsTrailheads and Access PointsPriority Areas for Increasing Access to Regional RecreationPriority Areas for Increasing Access to Rural RecreationPriority Area for Environmental RestorationEnvironmental BenefitsEnvironmental BurdensComposite Population VulnerabilityNote that all data sources in the web map are courtesy of the Los Angeles County Department of Parks and Recreation (DPR). If you'd like to learn more about the data and analysis used in the PNA+, visit https://lacountyparkneeds.org/pnaplus-report/.

DISCLAIMER: The data herein is for informational purposes, and may not have been prepared for or be suitable for legal, engineering, or surveying intents. The County of Los Angeles reserves the right to change, restrict, or discontinue access at any time. All users of the maps and data presented on https://lacounty.maps.arcgis.com or deriving from any LA County REST URLs agree to the "Terms of Use" outlined on the County of LA Enterprise GIS (eGIS) Hub (https://egis-lacounty.hub.arcgis.com/pages/terms-of-use).

Los Angeles County Health Districts (HDs), updated in 2022. Los Angeles County is divided into twenty-six HDs, which are subdivisions of Service Planning areas (SPAs). HDs are used for planning and managing health service delivery across Los Angeles County.Updating HD and SPA boundaries to align with new U.S. Census Bureau census tract boundaries is performed after every Decennial Census.How was this data created?The 2020 Census Tracts from the U.S. Census Bureau's 2021 TIGER/Line were used as building blocks for the HD layer. The 2012 HD layer was compared to the 2020 Census Tracts layer to provide preliminary information on the HDs associated with each Census Tract and to determine where HDs no longer aligned. For the 2022 HD layer, boundaries were updated to align with 2020 Census Tract boundary changes within their corresponding 2022 SPAs with consideration for maintaining effective service delivery. The HDs were refined to conform with the County boundary and coastline from the Supervisorial Districts 2021 and County Boundary layers.Data Fields:HD (Type = Text, Length = 2, Alias = HD 2022): Health District number as text; a numeric but non-quantitative identifierHD_NAME (Type = Text, Length = 30, Alias = HD NAME): Full Health District nameSPA (Type = Text, Length = 1, Alias = SPA 2022): SPA number that HD resides withinSPA_NAME (Type = Text, Length = 30, Alias SPA NAME): Full SPA name that HD resides withinHD_NUM (Type = Short, Alias HD NUM): Health District number as number; field type from earlier 2012 version of HDsUpdate Frequency: After every Decennial Census or as needed

Tabular data of population by age groups, race and gender, and the poverty by race is attached to the split tract geography to create this split tract with population and poverty data. Split tract data is the product of 2010 census tracts split by 2019 incorporated city boundaries and unincorporated community/countywide statistical areas (CSA) boundaries. The census tract boundaries have been altered and aligned where necessary with legal city boundaries and unincorporated areas, including shoreline/coastal areas. Census Tract:Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau (https://www.census.gov/) released 2010 geographic boundaries data including census tracts for the analysis and mapping of demographic information across the United States. City Boundary:City Boundary data is the base map information for the County of Los Angeles. These City Boundaries are based on the Los Angeles County Seamless Cadastral Landbase. The Landbase is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works (DPW). This layer represents current city boundaries within Los Angeles County. The DPW provides the most current shapefiles representing city boundaries and city annexations. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California.Countywide Statistical Areas (CSA): The countywide Statistical Area (CSA) was defined to provide a common geographic boundary for reporting departmental statistics for unincorporated areas and incorporated Los Angeles city to the Board of Supervisors. The CSA boundary and CSA names are established by the CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies that reflect as best as possible the general name preferences of residents and historical names of areas. This data is primarily focused on broad statistics and reporting, not mapping of communities. This data is not designed to perfectly represent communities, nor jurisdictional boundaries such as Angeles National Forest. CSA represent board approved geographies comprised of Census block groups split by cities.Data Field:CT10: 2010 Census tractFIP19: 2019 City FIP CodeCITY: City name for incorporated cities and “Unincorporated” for unincorporated areas (as of July 1, 2019) CSA: Countywide Statistical Area (CSA) - Unincorporated area community names and LA City neighborhood names.CT10FIP19CSA: 2010 census tract with 2019 city FIPs for incorporated cities, unincorporated areas and LA neighborhoods. SPA12: 2012 Service Planning Area (SPA) number.SPA_NAME: Service Planning Area name.HD12: 2012 Health District (HD) number: HD_NAME: Health District name.POP19_AGE_0_4: 2019 population 0 to 4 years oldPOP19_AGE_5_9: 2019 population 5 to 9 years old POP19_AGE_10_14: 2019 population 10 to 14 years old POP19_AGE_15_17: 2019 population 15 to 17 years old POP19_AGE_18_19: 2019 population 18 to 19 years old POP19_AGE_20_44: 2019 population 20 to 24 years old POP19_AGE_25_29: 2019 population 25 to 29 years old POP19_AGE_30_34: 2019 population 30 to 34 years old POP19_AGE_35_44: 2019 population 35 to 44 years old POP19_AGE_45_54: 2019 population 45 to 54 years old POP19_AGE_55_64: 2019 population 55 to 64 years old POP19_AGE_65_74: 2019 population 65 to 74 years old POP19_AGE_75_84: 2019 population 75 to 84 years old POP19_AGE_85_100: 2019 population 85 years and older POP19_WHITE: 2019 Non-Hispanic White POP19_BLACK: 2019 Non-Hispanic African AmericanPOP19_AIAN: 2019 Non-Hispanic American Indian or Alaska NativePOP19_ASIAN: 2019 Non-Hispanic Asian POP19_HNPI: 2019 Non-Hispanic Hawaiian Native or Pacific IslanderPOP19_HISPANIC: 2019 HispanicPOP19_MALE: 2019 Male POP19_FEMALE: 2019 Female POV19_WHITE: 2019 Non-Hispanic White below 100% Federal Poverty Level POV19_BLACK: 2019 Non-Hispanic African American below 100% Federal Poverty Level POV19_AIAN: 2019 Non-Hispanic American Indian or Alaska Native below 100% Federal Poverty Level POV19_ASIAN: 2019 Non-Hispanic Asian below 100% Federal Poverty Level POV19_HNPI: 2019 Non-Hispanic Hawaiian Native or Pacific Islander below 100% Federal Poverty Level POV19_HISPANIC: 2019 Hispanic below 100% Federal Poverty Level POV19_TOTAL: 2019 Total population below 100% Federal Poverty Level POP19_TOTAL: 2019 Total PopulationAREA_SQMIL: Area in square milePOP19_DENSITY: Population per square mile.POV19_PERCENT: Poverty percentage.How this data created?The tabular data of population by age groups, by ethnic groups and by gender, and the poverty by ethnic groups is attributed to the split tract geography to create this data. Split tract polygon data is created by intersecting 2010 census tract polygons, LA Country City Boundary polygons and Countywide Statistical Areas (CSA) polygon data. The resulting polygon boundary aligned and matched with the legal city boundary whenever possible. Note:1. Population and poverty data estimated as of July 1, 2019. 2. 2010 Census tract and 2020 census tracts are not the same. Similarly, city and community boundary are not the same because boundary is reviewed and updated annually.

Infant death is defined as death occurring within the first year of life. Single-year data are only available for Los Angeles County overall, Service Planning Areas, Supervisorial Districts, City of Los Angeles overall, and City of Los Angeles Council Districts. Data are not presented for geographies with number of infant deaths less than 11.Infant deaths are among the most tragic health events in a community, and sadly, they occur at a much greater frequency in some communities than in others. Chronic stress associated with both historical and ongoing racism are important contributing factors. Cities and communities can play an important role in addressing these inequities in reproductive health outcomes by examining their policies and practices with a racial equity lens, ensuring that all groups have the opportunities and resources needed to achieve optimal health.For more information about the Community Health Profiles Data Initiative, please see the initiative homepage.