Assessor - Neighborhood Boundaries

Description

Neighborhood polygons used by the Cook County Assessor's Office for valuation and reporting. These neighborhoods are specific to the Assessor. They are intended to represent homogenous housing submarkets, NOT Chicago community areas or municipalities.

These neighborhoods were reconstructed from individual parcels using spatial buffering and simplification. The full transformation script can be found on the Assessor's GitHub.

Read about the Assessor's 2025 Open Data Refresh.

Resources

Name Format Description Link
Comma Separated Values File CSV Open resource
JSON File JSON Open resource
RDF File RDF Open resource
XML File XML Open resource

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