Cook County Parcel Data with Geographic and Tax District Attributes

A current-year universe of Cook County parcels with attached geographic, governmental, and spatial data. The dataset is updated monthly and maintained by the Cook County Assessor's office. It includes data for the current tax year, which may not yet be complete or final until certified by the Board of Review.

Use Cases

• Analyzing spatial relationships between parcels and school districts using `school_elementary_district_geoid` and `latitude`/`longitude`.
• Modeling property characteristics or valuations based on geographic and administrative features like `township_code` and `zip_code`.
• Joining demographic data from the U.S. Census using geographic identifiers such as `census_place_geoid` and `census_state_senate_geoid`.

Strengths

• Contains geographic centroids (`latitude`, `longitude`) for spatial analysis.
• Integrates multiple data sources, including tax codes and spatial joins from government shapefiles.
• Updated monthly with a last recorded update on 2026-04-01.

Limitations

• Row count is unknown, which may limit suitability assessment.
• Some properties may be missing coordinates or addresses, as noted in the description.
• The `tax_district_code` column is not currently up-to-date, and municipality sources may conflict.

Provenance

Source

Cook County Assessor's Office via datacatalog.cookcountyil.gov

Collection Method

Aggregated from parcel shapefiles, tax records, and spatial joins with governmental boundaries.

Time Range

Current tax year only.

Freshness

Updated monthly; last updated 2026-04-01 16:37:02.

Geography

Cook County, Illinois, USA.