2000 Census block boundaries clipped to Chicago. The data can be viewed on the Chicago Data Portal with a web browser. However, to view or use the files outside of a web browser, you will need to use compression software and special GIS software, such as ESRI ArcGIS (shapefile) or Google Earth (KML or KMZ), is required.

CTA's statutory service area is defined in the
Metropolitan Transit Authority Act of 1945 (70 ILCS 3605)
as being, "All territory in the County of Cook, State of Illinois,
lying east of the east line of Range Eleven, East of the Third
Prinicipal Meridian of the United States Government Survey..."

Cook County facilities. To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS, is required.

KML file of cemeteries located in Cook County. To view or use these files, special GIS software such as Google Earth is required.

Cemetaries located in Cook County. To view or use these shapefiles, compression software and special GIS software, such as ESRI ArcGIS, is required.

Ward office locations for aldermen. The data can be viewed on the Chicago Data Portal with a web browser. However, to view or use the files outside of a web browser, you will need to use compression software and special GIS software, such as ESRI ArcGIS (shapefile) or Google Earth (KML or KMZ).

KML file of Cook County facilities. To view or use these files, special GIS software such as Google Earth is required.

Boundaries of Chicago's surrounding municipalities. To view or use these files, special GIS software such as Google Earth is required. To download, right-click the "Download" link above and choose "Save link as."

OUTDATED. See the current data at https://data.cityofchicago.org/d/fwns-qqic -- To view or use these files, compression software and special GIS software, such as ESRI ArcGIS, is required. To download, right-click the "Download" link above and choose "Save link as." This version of the data was posted 8/8/2012 and stayed live until 7/16/2015, when it was replaced with the list of aldermen inaugurated 5/18/2015, after allowing time for most office space arrangements to be finalized.

This dataset is historical-only. The current dataset is https://data.cityofchicago.org/d/uvpq-qeeq. -- Ward precincts, which function as local election districts to determine the polling places for voters, based on their addresses. Precincts are based on U.S. Census Bureau blocks. These precincts were used in 2010.

OUTDATED. See the current data at https://data.cityofchicago.org/d/htai-wnw4 -- List of alderman, office address, phone number, and website for all 50 Chicago wards. This version of the data was posted 7/2/2013 and stayed live until 7/16/2015, when it was replaced with the list of aldermen inaugurated 5/18/2015, after allowing time for most office space arrangements to be finalized.

OUTDATED. See the current data at https://data.cityofchicago.org/d/fwns-qqic -- To view or use these files, special GIS software such as Google Earth is required. To download, right-click the "Download" link above and choose "Save link as." This version of the data was posted 8/8/2012 and stayed live until 7/16/2015, when it was replaced with the list of aldermen inaugurated 5/18/2015, after allowing time for most office space arrangements to be finalized.