Explore congressional and Illinois legislative reference boundaries. The map and detailed table load below. This map does not determine your personal voting districts or ballot.
If the map stays blank or reports an error, use the text summary beneath it, open the Lake County voter guide, or choose another District Explorer.
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119th Congressional Districts: 05, 09, 10, 11. Current-serving 119th Congress January 2025–2027.
120th Congressional Districts: 05, 09, 10, 11. 2026 election cycle; 120th Congress January 2027–2029.
2026 State Legislative Districts – Upper: 026, 029, 030, 031, 032. 2026 election cycle.
2026 State Legislative Districts – Lower: 051, 052, 057, 058, 059, 060, 061, 062, 064. 2026 election cycle.
U.S. Census Bureau TIGERweb, January 1, 2026 vintage. Reference inputs independently reviewed October 29, 2026. Census geography is a boundary reference, not a legal survey. Undefined Lake Michigan district areas are not assigned; the county outline includes water context. The map does not certify your precinct, polling place or ballot.
Lake County voter guide · Census redistricting geography · All published District Explorers