Structure-related polygons observed in the most recent aerial orthophotography - data is current as of the most recent date in the "Date_Changed" field. Other planimetric datasets available:Milwaukee County Planimetric Environmental PointsMilwaukee County Planimetric Water PolygonsMilwaukee County Planimetric Water LinesMilwaukee County Planimetric Structure PolygonsMilwaukee County Planimetric Utility PointsMilwaukee County Planimetric Transportation PolygonsMilwaukee County Planimetric Railroad SignsFor the entire Planimetric dataset, users can download the Planimetric database: Planimetric Download Note: download will begin when link is clicked

Milwaukee County cadastral map (cached) - data refreshed Jan, Mar, May, Jul, Sep, NovOther related layers available:Milwaukee County Parcels with Property Information

Milwaukee County Owned Parcels

Milwaukee County Cadastral DatasetOptional replacements for the Cadastral Cached service:County Vector Basemap – With Parcel Outlines

County Vector Basemap – Without Parcel Outlines

ESRI Vector Basemaps (Community Maps) cadastral layers (cached)

User guide for Milwaukee County's Interactive Mapping Application. Created December 2023, PDF file format.

************************In early 2025, the source of MCLIO public layers will change.*****************************Please refer to these documents for changes: https://mclio.maps.arcgis.com/home/item.html?id=0bb68bbae37445adb045d6a44fed3f2a https://mclio.maps.arcgis.com/home/item.html?id=79c6c9d737c94753a388db7c6f480149Please update maps, apps and data connections accordingly!Contour lines and spot elevation points are derived from 2020 LiDAR data. Dataset is large and takes several hours to download. Consider connecting to the service, downloading a subset of the data through the feature service, or download a prepackaged file geodatabase with the topographic and planimetric data that covers a section (https://mclio.maps.arcgis.com/apps/webappviewer/index.html?id=84c7b8d95af04cdda6b0c2ae26590531). For a countywide dataset, please download the file geodatabase available in the MCLIO Data Download HUB

Performance can vary. If the contour lines are only being used for reference and you don't need the actual vector data, consider using the cached service (https://lio.milwaukeecountywi.gov/arcgis/rest/services/Topographic/Topographic_Cached/MapServer/0).

This feature layer contains the PLSS Sections in Milwaukee County. The Southeastern Wisconsin Regional Planning Commission (SEWRPC) is the owner of the PLSS (Public Land Survey System) dataset which includes:PLSS Corner PointsPLSS SectionsPLSS TownshipsPLSS Quarter Sections Additional information such as survey documents can be found on SEWRPC's web application found here .

Transportation-related planimetric points that represent railroad crossings in Milwaukee County. Data observed in aerial imagery and digitized. Data may not reflect actual conditions.Other planimetric datasets available:Milwaukee County Planimetric Environmental PointsMilwaukee County Planimetric Water PolygonsMilwaukee County Planimetric Water LinesMilwaukee County Planimetric Structure PolygonsMilwaukee County Planimetric Utility PointsMilwaukee County Planimetric Transportation PolygonsMilwaukee County Planimetric Railroad SignsFor the entire Planimetric dataset, users can download the Planimetric database: Planimetric Download Note: download will begin when link is clicked

City Common Council District or Village boundary polygons within Milwaukee County, Wisconsin with information about Common Council Members (Alderpersons) or Village Trustees. Data is updated after each election cycle by MCLIO staff. *Some datasets are from the Legislative Technology Services Bureau. LTSB Website & LTSB HUB Site Other election boundary related data:Wisconsin State Senate Districts Source: LTSB Visit LTSB HUB site to download.Wisconsin State Assembly Districts Source: LTSB Visit LTSB HUB Site to download.Milwaukee County City Common Council/Village BoardMilwaukee County Supervisory Districts Wisconsin Congressional Districts Source: LTSB . Visit LTSB HUB site to download.Milwaukee County US Senate RepresentationMilwaukee County Municipal ExecutivesMilwaukee County Voting Wards

Points that represent locations of addresses. The points are placed within the parcel with which an address is associated and when possible, points are placed within the footprint of the building with which an address is associated. When a parcel or building is associated with multiple addresses, multiple points will be placed within each parcel or building. This layer includes keys that relate to related street centerlines, addressable building polygons, and parcel polygons. Data is refreshed Feb, Apr, Jun, Aug, Oct, Dec.The following layers are associated with this dataset:Milwaukee County Planimetric Structure Polygons Milwaukee County Parcels with Property InformationMilwaukee County Addressable Building PolygonsMilwaukee County Street Intersection Points

Milwaukee County parcels with property information filtered to display Milwaukee County owned properties. The parcel data is sourced from the municipalities and aggregated into a single dataset by MCLIO. Due to the varying data input some parcels may be categorized incorrectly. This layer is intended for reference only. Most errors in the parcel information will require correction from the municipality assessor. Other Property Information related layers:Milwaukee County Parcels with Property InformationMilwaukee County Owned ParcelsMilwaukee County Cadastral Dataset

2020 Census tract polygons covering Milwaukee County, Wisconsin for use with tract-level American Community Survey data and 2020 U.S. Census data. Other census related boundaries:Milwaukee County Zip Code Tabulation AreasMilwaukee County Census TractMilwaukee County Census BlockMilwaukee County Census Block GroupsCensus boundaries are intended to be used with census data that can be found here: American Community Survey . ESRI Living Atlas also provides curated layers with census data that can be found here: ArcGIS Living Atlas of the World.

Milwaukee County Boundary. Additional administrative boundary layers:Milwaukee County Municipal Boundaries

Milwaukee County School District Boundaries

Milwaukee County Boundary

Polygons representing parcels associated with one or more plats of survey - polygons are stacked for parcels with more than one associated plat of survey. Other property information related data:Milwaukee County Foreclosed Parcels

Milwaukee County Parcels with Property Information

Milwaukee County Parcels with Plats of Survey

Polygons representing tax parcels covering Milwaukee County, Wisconsin. There is one polygon per parcel identifier (TAXKEY) and 'stacked' polygons that represent condominium parcels. This dataset includes property information attributes such as parcel address, type of parcel, exemption status, and legal description. The data is compiled by Milwaukee County Land Information Office from the 19 municipalities and is provided as a single spatial dataset. Parcel data is refreshed monthly - see the details on the right side for the last refresh date. Item Updated date listed at the top does not correctly reflect the data updates.To view assessment information, click on the assessment URL provided in the layer. Assessment data is updated by the Municipality assessors. Other Property Information related layers:Milwaukee County Parcels with Property InformationMilwaukee County Owned ParcelsMilwaukee County Cadastral DatasetMilwaukee County Tax Exempt Parcels

Tree and marsh points digitized from aerial imagery. Data may not represent actual conditions and is not regularly updated. Part of the planimetric dataset. Other planimetric datasets available:Milwaukee County Planimetric Environmental PointsMilwaukee County Planimetric Water PolygonsMilwaukee County Planimetric Water LinesMilwaukee County Planimetric Structure PolygonsMilwaukee County Planimetric Utility PointsMilwaukee County Planimetric Transportation PolygonsMilwaukee County Planimetric Railroad SignsFor the entire Planimetric dataset, users can download the Planimetric database: Planimetric Download *Note: download will begin when link is clicked*Other environmental related data:Milwaukee County Lagoons

Milwaukee County Lidar Tree Canopy 2020

Milwaukee County Lidar Tree Canopy 2015

Milwaukee County Planimetric Tree and Marsh Points

Milwaukee County Planimetric Water Polygons

Milwaukee County Planimetric Water Lines

Hydrographic/hydrologic planimetric lines in Milwaukee County digitized from aerial ortho imagery. Features representing larger river, stream, or creek outlines have been named for labeling purposes. Naming conventions have been taken from other sources - open map and MMSD jurisdictional stream layer. This planimetric layer is not an exhaustive source for water data in Milwaukee County. Other sources for water data include:MMSD Jurisdictional Stream Layer - simple feature layer that focuses on Milwaukee Metropolitan Sewerage District's jurisdictional streams.

Wisconsin DNR Water Data - detailed feature layers for streams and open water data provided by the Wisconsin Dept of Natural Resources.Other planimetric datasets available:Milwaukee County Planimetric Environmental PointsMilwaukee County Planimetric Water PolygonsMilwaukee County Planimetric Water LinesMilwaukee County Planimetric Structure PolygonsMilwaukee County Planimetric Utility PointsMilwaukee County Planimetric Transportation PolygonsMilwaukee County Planimetric Railroad SignsFor the entire Planimetric dataset, users can download the Planimetric database: Planimetric Download *Note: download will begin when link is clicked*Other environmental related data:Milwaukee County LagoonsMilwaukee County Lidar Tree Canopy 2020Milwaukee County Lidar Tree Canopy 2015Milwaukee County Planimetric Tree and Marsh PointsMilwaukee County Planimetric Water PolygonsMilwaukee County Planimetric Water Lines

Milwaukee County Sheriff real estate sales that occurred within one year of the date shown in the 'DATE_MCLIO' field, including future sales. Includes one parcel polygon per Sheriff Sale record that could be associated with MCLIO parcel geometries based on matching parcel ID values. If a geometry could not be associated with a Sheriff sale record (due to an invalid or malformed Sheriff sale address), the record will not be represented as a parcel polygon here.Other property information related data:Milwaukee County Foreclosed ParcelsMilwaukee County Parcels with Property InformationMilwaukee County Parcels with Plats of Survey

greyscale ortho-rectified vertical aerial photography covering Milwaukee County Wisconsin - captured March-April 2000 - resolution of 12 inches per pixel - see https://maps.sewrpc.org/regionallandinfo/metadata/2000_Orthophotography.htm for full details

The dataset consists of tiled orthogonal imagery produced from nadir images captured by Pictometry International during the period of April 10th, 2010 to April 23rd, 2010. Automatic aerial triangulation (AAT) was performed. The triangulated frames were rectified to a Pictometry Produced LiDAR derived DEM. Mosaicing was performed using an automatic seaming algorithm and manually edited to eliminate seams through elevated features where possible.

greyscale non-ortho-rectified vertical aerial photography covering Milwaukee County Wisconsin; captured April 1967; resolution of approx. 11 inches per pixel; source 9 inch x 9 inch 1:20,000 prints were scanned at 1,800 pixels per inch and georeferenced via third-order polynomial transformation using ortho-rectified imagery as reference

Street Centerlines with Address Ranges and Highway Designations, Milwaukee County, WI. Data refreshed Feb, Apr, Jun, Aug, Oct, and Dec. Other related datasets:Milwaukee County Planimetric Transportation PolygonsMilwaukee County Street Intersection PointsMilwaukee County Address PointsMilwaukee County Cached Street Labels