Suburban Cook County Election Precinct Boundaries with Township Data

Suburban Cook County Election Precincts maintained by the Cook County Clerk's Election Department, excluding the City of Chicago. A post-census effort in December 2021 reduced the number of precincts countywide to 1430. Precincts are updated as needed before every election by the Cook County Clerk's Elections Department.

Use Cases

• Map precinct boundaries and calculate area using the_geom, Shape.STArea(), and Shape.STLength() columns.
• Analyze precinct organization by township using Township_Number, Township_Name, and Precinct_Number.
• Join election results or demographic data using the unique precinctid and standard geographic codes STATEFP and COUNTYFP.
• Track administrative updates using the last_edited_date column.

Strengths

• Precinct count was specifically reduced to 1430 in a 2021 consolidation effort.
• Contains standard FIPS codes (STATEFP, COUNTYFP) for interoperability with other government datasets.
• Includes geometric columns (the_geom, Shape.STArea()) for spatial analysis.
• Maintained and updated before elections by the official Cook County Clerk's Elections Department.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.
• Data covers only suburban Cook County, excluding the City of Chicago.

Provenance

Source

Cook County Clerk's Election Department via datacatalog.cookcountyil.gov.

Collection Method

Maintained as part of the Census Redistricting Data Program, with updates using GIS tools before elections.

Freshness

Last updated 2026-01-27 20:43:04; freshness should be verified.

Geography

Suburban Cook County, Illinois, USA.