Chicago Ward Precinct Boundaries for Elections from 2025

Ward precincts function as local election districts to determine polling places for voters based on their addresses. This version of the precinct layout was approved by the Chicago Board of Election Commissioners on December 9, 2025, and first used in the March 17, 2026 General Primary. The dataset is provided by the City of Chicago and was last updated on March 22, 2026.

Use Cases

• Mapping voter addresses to polling places based on precinct boundaries.
• Analyzing changes in electoral district boundaries between the 2023 and 2025 versions.
• Creating derived map views for civic engagement or election planning tools.
• Studying the spatial relationship between precincts and U.S. Census Bureau blocks.

Strengths

• Boundaries are based on U.S. Census Bureau blocks, providing a standardized geographic foundation.
• Specific changes from the previous version are documented, detailing adjustments in Wards 44 and 50.
• The dataset is provided in multiple formats (CSV, JSON, RDF, XML) for flexibility.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Column-level documentation is absent; field semantics must be inferred after download.
• The description includes a disclaimer against reliance for legal precision.

Provenance

Source

City of Chicago

Collection Method

Precincts are based on U.S. Census Bureau blocks, with a layout approved by the Chicago Board of Election Commissioners.

Time Range

Effective from 2025, first used in the March 17, 2026 election.

Freshness

Last updated 2026-03-22 04:06:59.996981; freshness should be verified.

Geography

City of Chicago, Illinois, United States.