Where the map comes from
District lines
U.S. Census Bureau 2024 cartographic boundary files (1:500,000): cb_2024_us_cd119_500k (Ohio features only; these are the old lines, not the 2026 map) for the 15 U.S. House districts, cb_2024_39_sldu_500k for the 33 state Senate districts, cb_2024_39_sldl_500k for the 99 state House districts, cb_2024_us_county_500k for counties and cb_2024_39_place_500k for city and town limits. These show the Ohio Redistricting Commission's 2023 Ohio Senate and Ohio House maps. District files are converted without simplification; county outlines and city limits are simplified for display. Near a boundary line they can be off by a block or more.
Files
cb_2024_39_sldu_500k.zip: www2.census.gov, retrieved 2026-10-13cb_2024_39_sldl_500k.zip: www2.census.gov, retrieved 2026-10-13cb_2024_39_place_500k.zip: www2.census.gov, retrieved 2026-10-13oh.csv: data.openstates.org, retrieved 2026-10-13FAILED (http 403, got: HTML document, ASCII text, with very lon, 1285589 bytes): ohiosos.gov (Ohio Secretary of State), retrieved 2026-10-13FAILED (http 403, got: HTML document, ASCII text, with very lon, 1285523 bytes): ohiosos.gov (Ohio Secretary of State), retrieved 2026-10-13FAILED (http 403, got: HTML document, ASCII text, with very lon, 1285450 bytes): ohiosos.gov (Ohio Secretary of State), retrieved 2026-10-13
Census files: www2.census.gov/geo/tiger/GENZ2024/shp/.
Software
Leaflet 1.9.4 (BSD-2-Clause), served from this site. Optional street map © OpenStreetMap contributors; optional address search by OpenStreetMap Nominatim.