The legislative districts contain the geographically defined territories used for representation in the California State Assembly, California State Senate and the U.S. House of Representatives from California. These three boundary layers were approved by the California Citizens Redistricting Commission in 2021 following the completion of the 2020 United States Census.

California State Senate district boundaries intended for the NEVI map.Data downloaded in October 2024 from https://gis.data.ca.gov/maps/b31d93f08c074753b89f8cbb0b8beed9/about.

Final approved map by the 2020 California Citizens Redistricting Commission for the California State Senate.

Final approved map by the 2020 California Citizens Redistricting Commission for the California State Senate; the authoritative and official delineations of the California State Senate drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.

Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.

Each of the 40 Senate districts has an ideal population of nearly one million people and represents the largest state legislative districts in the nation. In consideration of population equality, the Commission chose to limit the population deviation as close to zero percent as practicable. Per the California Constitution, the Commission strived to nest two Assembly districts where practicable. However, higher ranking criteria made this difficult in practice. While the size of the Senate districts allowed the Commission to recognize broadly shared interests, these interests did not always overlap exactly with the interests of smaller communities recognized in the related Assembly districts. Based on the large number of people in each district, there were a variety of different interests that were balanced and included.

Polygon layers for the 2011 and 2022 Senate district boundaries and the 2022 Assembly district boundaries.

This web map of California legislative districts includes the geographically defined territories used for representation in the California State Assembly, California State Senate and the US House of Representatives from California. These three boundary layers are derived from the US Census Bureau's 2018 TIGER/Line database and are designed to overlay with the California Department of Education’s (CDE) education related GIS content.

The 80 California State Assembly Districts represent the geographically defined territories used for electing members to the lower (house) chamber of the California State Legislature. The current state assembly boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.

The 40 state senate districts represent the geographically defined territories used for electing members to the upper (senate) chamber of the California State Legislature. The current state senate boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.

The 53 congressional districts within the State of California represent the geographically defined territories used for electing members to the U.S. House of Representatives. The current U.S. Congressional boundaries in California were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020

This is the last boundary change until the next redistricting following the 2030 Census. All of the districts now reflect the 2021 Citizens Redistricting Commission(CRC) plan. The only thing that will change is the members' names and parties as elections are held, appointments are made, or party affiliations change.Senate Districts feature layer is updated as-needed and we expect to update it more regularly in the future.Schema:F2020_POP: The 2020 population of the district as reported by the census.F2020_HU: Number of housing units in the district in 2020 as reported by the census.CRC_POP: Citizen's Redistricting Commission population.District: The District is the district number.Party: The Party is the party represented.last_name: The last name is the last name of the representative.first_name: The first name is the first name of the representative.district_website: The district website is the link to the district website.For more information about the F2020_Pop and the F2020_HU visit: https://www.census.gov/programs-surveys/decennial-census/about/rdo/summary-files.html

This web map of California legislative districts includes the geographically defined territories used for representation in the California State Assembly, California State Senate and the US House of Representatives from California. These three boundary layers are derived from the US Census Bureau's 2018 TIGER/Line database and are designed to overlay with the California Department of Education’s (CDE) education related GIS content.The 80 California State Assembly Districts represent the geographically defined territories used for electing members to the lower (house) chamber of the California State Legislature. The current state assembly boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.The 40 state senate districts represent the geographically defined territories used for electing members to the upper (senate) chamber of the California State Legislature. The current state senate boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.The 53 congressional districts within the State of California represent the geographically defined territories used for electing members to the U.S. House of Representatives. The current U.S. Congressional boundaries in California were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020

Assembly Districts and Senate Districts GIS data were downloaded from California Citizens Redistricting Commission http://wedrawthelines.ca.gov . The Senate Districts layer represents California 2011 Senate District boundaries. The data is the equivalency of the final certified district map of the California State Senate District boundaries that was adopted on August 15, 2011 by the California Citizens Redistricting Commission (CRC) for the June 2012 primary elections. The Assembly Districts layer represents California 2011 Assembly boundaries. The official membership is current as of September 3, 2015 (Updated by Caltrans, HQ GIS Branch.)

The Congressional Districts layer represents the political boundaries for the 113th congressional districts. The official membership is current as of January 3, 2015 (Updated by Caltrans, HQ GIS Branch.) The original GIS data was downloaded from TIGER/Line database.

Link to landing page referenced by identifier. Service Protocol: Link to landing page referenced by identifier. Link Function: information-- dc:identifier.

This dataset is one from a series of district layers pertaining to California Senate Districts that are derived from the California State Senate information. All data layers are reprojected into the SCAG standard projection. The following district layer is included in the series: Senate_districts: Current California Senate Districts based on the new district boundaries enacted into state law on September 13, 2001, and signed into law on September 13, 2001, and signed into law on September 26, 2001 for use with the March 2002 primary election The boundary has been updated as of 11/2011

The California Citizens Redistricting Commission (Commissioner) was established pursuant to the procedures set forth by Proposition 11, the Voters First Act, and Proposition 20, the Voters First Act for Congress, the provisions of which are now found in Section 2 of Article XXI of the California Constitution and at Government Code Section 8252. These constitutional and statutory provisions set forth the Commission’s responsibilities with respect to drawing the boundary lines for the California Assembly, Senate, Board of Equalization and Congressional districts (the Maps).Resolution of August 15, 2011 certifying the statewide California Congressional districts were approved by the Commission in the manner required by Section 2 of Article XXI of the California Constitution; a copy of the statewide Congressional map; copies of the 53 individual Congressional districts; and a “disc” labeled crc_20110815_congress_certified_statewide.zip SHA-1: 1893c0695a42454a202f5b1ef433abff6b491db9 containing the unique data files for the Congressional districts from which the statewide and individual district maps are created.Commission Background:In accordance with the Voters FIRST Act (Act), the California State Auditor randomly selected the first eight members of the first Citizens Redistricting Commission (Commission) on November 18, 2010. These first eight commissioners—three who are Democrats, three who are Republican, and two who are either Decline-to-State or are registered with another party—were part of the 36 eligible applicants that remained in the sub-pools after the legislative leaders, exercised their authority to make strikes and eliminated the names of 24 applicants from the pool of 60 of the most qualified applicants identified on September 23, 2010 by the Auditor’s Applicant Review Panel (Panel). The Panel reviewed and evaluated the applicants based on criteria set forth by the Act approved by voters in November 2008; including relevant analytical skills, the ability to be impartial; and a demonstrated appreciation for California’s diverse demographics and geography.

© California Citizens Redistricting Commission

The 2023 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. State Legislative Districts (SLDs) are the areas from which members are elected to state legislatures. The SLDs embody the upper (senate) and lower (house) chambers of the state legislature. Nebraska has a unicameral legislature and the District of Columbia has a single council, both of which the Census Bureau treats as upper-chamber legislative areas for the purpose of data presentation; there are no data by SLDL for either Nebraska or the District of Columbia. A unique three-character census code, identified by state participants, is assigned to each SLD within a state. In Connecticut, Illinois, Louisiana, New Hampshire, Wisconsin, and Puerto Rico, the Redistricting Data Program (RDP) participant did not define the SLDs to cover all of the state or state equivalent area. In these areas with no SLDs defined, the code "ZZZ" has been assigned, which is treated as a single SLD for purposes of data presentation. The generarlized boundaries in this file are based on the most recent state legislative district boundaries collected by the Census Bureau for the 2022 election year and provided by state-level participants through the RDP.

abstract: This is a map of California State Senate Districts with representatives elected before redistricting. Geography is based on boundary lines published by the California Redistricting Commission. Senate member information is updated daily.This is a map of California State Senate Districts (pre-redistricting). Senate member information is updated daily.Senate (Elected Pre Redisticting)

This web map of California legislative districts includes the geographically defined territories used for representation in the California State Assembly, California State Senate and the US House of Representatives from California. These three boundary layers are derived from the US Census Bureau's 2018 TIGER/Line database and are designed to overlay with the California Department of Education’s (CDE) education related GIS content.The 80 California State Assembly Districts represent the geographically defined territories used for electing members to the lower (house) chamber of the California State Legislature. The current state assembly boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.The 40 state senate districts represent the geographically defined territories used for electing members to the upper (senate) chamber of the California State Legislature. The current state senate boundaries were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020.The 53 congressional districts within the State of California represent the geographically defined territories used for electing members to the U.S. House of Representatives. The current U.S. Congressional boundaries in California were determined by the California Citizens Redistricting Commission following the completion of the 2010 United States Census and will remain valid until 2020

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.

Senate Districts for the State of California

abstract: This is a map of California State Senate Districts with representatives elected post-redistricting. Geography is based on boundary lines published by the California Redistricting Commission. Senate member information is updated daily.This is a map of California State Senate Districts (post redistricting). Senate member information is updated daily.Senate (Elected Post Redisticting)

The 2020 cartographic boundary KMLs are simplified representations of selected geographic areas from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). These boundary files are specifically designed for small-scale thematic mapping. When possible, generalization is performed with the intent to maintain the hierarchical relationships among geographies and to maintain the alignment of geographies within a file set for a given year. Geographic areas may not align with the same areas from another year. Some geographies are available as nation-based files while others are available only as state-based files. State Legislative Districts (SLDs) are the areas from which members are elected to State legislatures. The SLDs embody the upper (senate) and lower (house) chambers of the state legislature. Nebraska has a unicameral legislature and the District of Columbia has a single council, both of which the Census Bureau treats as upper-chamber legislative areas for the purpose of data presentation; there are no data by SLDL for either Nebraska or the District of Columbia. A unique three-character census code, identified by State participants, is assigned to each SLD within a state. In Connecticut, Illinois, Louisiana, Maine, Maryland, Massachusetts, Michigan, Ohio, and Puerto Rico, the Redistricting Data Program (RDP) participant did not define the SLDs to cover all of the state or state equivalent area. In these areas with no SLDs defined, the code "ZZZ" has been assigned, which is treated as a single SLD for purposes of data presentation. The generalized boundaries in this file are based on the most recent state legislative district boundaries collected by the Census Bureau for the 2018 election year and provided by state-level participants through the RDP.

This layer contains the polygons of the 2011 California State Senate District for the county of Los Angeles. Last Update: November 2011Update Frequency: As NeededContact Information:

Los Angeles County Registrar-Recorder/County ClerkGeographic Information Systems SectionEsalazar@rrcc.lacounty.gov

This map contains the boundaries and information on state and federal legislative districts.