The law asks every Illinois election authority to send the State Board of Elections a PDF of its precinct map and to post it on its website. A PDF is made for people to look at: a computer cannot tell from it which side of a line an address falls on. This page lists, county by county, whether each of Illinois's 102 counties publishes its precinct map as data, only as a picture, or not at all, as we found it on its own website.
Or open the map and pick your location on it:
Find your precinct →Opens the map with both precinct layers on. Only the one that applies where you click will answer.
What we found
Of Illinois's 102 counties, as checked on 10 October 2026:
- 44 counties publish it as data: an online map service or a download that mapping software can read.
- 2 counties show it only on an online map a person can look at, with no way to read the lines as data.
- 24 counties post it only as a PDF or picture, which a person can read but a computer cannot.
- 22 counties have no precinct map that we could find on the county's own website, its map pages, or the documents they link to.
- 10 counties have a website or online map we could not read, because it refused automated readers, put up a challenge or a terms page, or did not answer; we did not try to get around any of them.
- 4 counties that do not publish their precinct map as data sent us a digital copy by e-mail when we asked.
Chicago runs its own elections, and the City of Chicago publishes its ward precincts as data. Cook County's row below is the suburban county around it.
Why the form matters
To tell someone which precinct their address is in, a lookup like this one needs the precinct lines as data. Where a county posts only a PDF, somebody has to trace every line by hand, and trace it again each time the county changes its precincts.
Where a county publishes no map this site can use, it falls back on the precinct map the 2020 Census collected, which is already wrong wherever a county has merged or redrawn precincts since.
Wisconsin and Minnesota each publish one statewide precinct map. In Illinois, each county publishes its own, or doesn't.
Every county
| County | What it publishes | Map | Notes |
|---|---|---|---|
| Adams | Publishes it as data | map data | Last edited 2 January 2025. |
| Alexander | No map found | Nothing on the county's website. A second county web address, used for the clerk's e-mail, refuses automated readers, so we could not look there. | |
| Bond | No map found | The county's online map has county board districts but no precincts. | |
| Boone | Publishes it as data | map data | |
| Brown | No map found | The election page posts results by precinct but no map. A second web address, used for the clerk's e-mail, did not answer. | |
| Bureau | No map found | The clerk's page says the county has 50 precincts but links no map. | |
| Calhoun | No map found | The county's website has no map pages beyond a visitors' map. | |
| Carroll | Posts it as a PDF or picture | One scanned PDF of 2017 township maps with the precinct lines drawn on by hand, scanned July 2025. | |
| Cass | Could not check | The county's website has no precinct map. Its online map runs on a service that puts up a challenge, so we could not look there. | |
| Champaign | Shows it on an online map only | maps page | The County Clerk links an online map of the precincts kept by the county's GIS consortium, which licenses the lines under terms that do not allow republishing them. |
| Christian | Could not check | The county's website puts up a challenge, and its other web address refuses automated readers. | |
| Clark | Posts it as a PDF or picture | maps page | A countywide map dated October 2014 and city maps from January 2015. |
| Clay | Posts it as a PDF or picture | maps page | One PDF per precinct, posted June 2026. We found 13, and the set may be missing one. |
| Clinton | Publishes it as data | map data | The precinct layer of the county's online map. Last edited 7 April 2026. |
| Coles | Publishes it as data | map data | Last edited 10 March 2022. |
| Cook | Publishes it as data | map data | Suburban Cook County only. Chicago's own precincts are published by the City of Chicago. |
| Crawford | Posts it as a PDF or picture | Scanned maps with the precinct names written on by hand, scanned February 2024. | |
| Cumberland | No map found | The county's online map has no precinct layer. | |
| De Witt | Publishes it as data | map data | Kept on a mapping company's account. Last edited 13 March 2024. |
| DeKalb | Publishes it as data | map data | Last edited 22 August 2025. |
| Douglas | Publishes it as data | map data | Last edited 6 May 2026. The election page also posts a 2015 PDF map. |
| DuPage | Publishes it as data | map data | The 2024 precinct map. Last edited 3 February 2026. |
| Edgar | No map found | The county's online map has no precinct layer. The clerk posts a list of the precincts each voting center serves. | |
| Edwards | No map found | We could not reach a county website, and the county's online maps have no precinct layer. | |
| Effingham | Publishes it as data | map data | Last edited 24 January 2024. |
| Fayette | Posts it as a PDF or picture | A county board district map, titled 2020, that also draws the precincts. | |
| Ford | Posts it as a PDF or picture | A countywide picture of the precincts, with 2011 scans of two townships' precincts, posted April 2022. | |
| Franklin | Publishes it as data | map data | Last edited 15 September 2026. The county's own pages do not link it; it is in the county's mapping account. |
| Fulton | Publishes it as data | map data | Last edited 11 October 2024. |
| Gallatin | Posts it as a PDF or picture | One scanned countywide map, posted May 2022. | |
| Greene | No map found | Nothing on the county's website or on its online maps, which Western Illinois University keeps. | |
| Grundy | Publishes it as data | map data | |
| Hamilton | Publishes it as data | map data | Kept on a mapping company's account, which the County Clerk pointed us to. Last edited 11 December 2023. |
| Hancock | No map found | The only district map is a 2023 county board district map. | |
| Hardin | No map found | The county's web address shows a placeholder page, and we found no other county website. | |
| Henderson | No map found | The county's web address shows a placeholder page. Its online maps, which Western Illinois University keeps, have no precinct layer. | |
| Henry | Posts it as a PDF or picture | maps page | One PDF per township, made in 2007. Sent us its digital map by e-mail on request. |
| Iroquois | Publishes it as data | map data | Published by the county assessor's office. Last edited 5 February 2026. |
| Jackson | Posts it as a PDF or picture | Maps dated 26 January 2012. | |
| Jasper | Posts it as a PDF or picture | Linked as the precinct map. It draws the 2022 county board districts and shows Ste. Marie's two precincts as one. | |
| Jefferson | Posts it as a PDF or picture | maps page | Maps of the precincts approved in May 2011. Sent us its digital map by e-mail on request. |
| Jersey | Posts it as a PDF or picture | A countywide map dated December 2021, with a closer 2022 picture of precincts Jersey 1 to 8. | |
| Jo Daviess | Posts it as a PDF or picture | A countywide map made 6 January 2022, with city maps. | |
| Johnson | No map found | The clerk's election site lists polling places but no map. The county's own web address could not be read. | |
| Kane | Publishes it as data | map data | Last edited 17 July 2025. |
| Kankakee | Publishes it as data | map data | |
| Kendall | Publishes it as data | map data | |
| Knox | Could not check | The county's website puts up a challenge, and its own map server has no precinct layer. The City of Galesburg publishes its own precincts as data. | |
| LaSalle | Publishes it as data | map data | |
| Lake | Publishes it as data | map data | Last edited 4 October 2026. |
| Lawrence | No map found | The county's online map has no precinct layer. | |
| Lee | Publishes it as data | map data | |
| Livingston | Posts it as a PDF or picture | A countywide map updated August 2025, with closer maps of seven towns and townships. | |
| Logan | Publishes it as data | map data | Published for the county by the Tri-County Regional Planning Commission. Last edited 2 April 2026. |
| Macon | Publishes it as data | map data | Last edited 14 September 2022. |
| Macoupin | Publishes it as data | map data | Published on the county's open-data site. Last updated 1 November 2025. |
| Madison | Publishes it as data | map data | |
| Marion | No map found | The county's website has no election page, and its online map has no precinct layer. | |
| Marshall | Could not check | The county's website has no precinct map, and we could not read its online map. | |
| Mason | Posts it as a PDF or picture | maps page | One picture per precinct, posted April 2024. |
| Massac | Could not check | No precinct map on the clerk's page or the county's map site, and we could not read the assessor's online map. | |
| McDonough | Publishes it as data | map data | Kept for the county by Western Illinois University's GIS Center and linked from the county's voter registration page. |
| McHenry | Publishes it as data | map data | Last edited 2 October 2026. |
| McLean | Publishes it as data | map data | |
| Menard | Posts it as a PDF or picture | picture | One picture of all 14 precincts, posted April 2024. |
| Mercer | Could not check | The county's website has no precinct map, and we could not read its online map. | |
| Monroe | Publishes it as data | map data | Last edited 3 March 2026. |
| Montgomery | Posts it as a PDF or picture | maps page | Precinct maps made in 2020, and a 2022 map of county board districts and precincts. Sent us its digital map by e-mail on request. |
| Morgan | Publishes it as data | map data | Last edited 30 March 2023. |
| Moultrie | Publishes it as data | map data | Kept on Coles County's map server and shown on Moultrie's county maps page. |
| Ogle | Posts it as a PDF or picture | A map book dated March 2022. An older precinct layer from 2016 is still online. Sent us its digital map by e-mail on request. | |
| Peoria | Publishes it as data | map data | Last edited 19 September 2026. |
| Perry | Could not check | The county's website has no precinct map. Its online map runs on a service that puts up a challenge, so we could not look there. | |
| Piatt | Could not check | The county's main online map opens only after accepting its terms, which we did not do. The rest of its website has no precinct map. | |
| Pike | No map found | The county's online map has no precinct layer. | |
| Pope | Could not check | No county website answered. | |
| Pulaski | No map found | The clerk's page lists the precincts with their results but no map. | |
| Putnam | Publishes it as data | map data | A copy of the 2020 Census precinct map, on the county's online map. |
| Randolph | Publishes it as data | map data | The mapping account it sits on does not say who owns it. Last edited 14 April 2026. |
| Richland | Shows it on an online map only | online map | The county's online map has a precinct layer. The County Clerk also posts a one-page picture of it, made in May 2026. |
| Rock Island | Publishes it as data | map data | Last edited 7 October 2022. |
| Saline | No map found | The clerk posts a table of polling places by precinct but no map. | |
| Sangamon | Publishes it as data | map data | Last edited 12 October 2023. |
| Schuyler | No map found | The county's online map has townships but no precincts. | |
| Scott | No map found | The clerk's election page links only to State Board tools and to results. | |
| Shelby | Posts it as a PDF or picture | A scanned book of precinct maps dated August 2022. | |
| St. Clair | Publishes it as data | map data | |
| Stark | Publishes it as data | map data | A public Google map that can be downloaded. The County Clerk told us in August 2026 that its precincts are correct; the county's website does not link it. |
| Stephenson | Posts it as a PDF or picture | maps page | Two maps, of the Freeport precincts and the rural precincts, posted January 2022. |
| Tazewell | Publishes it as data | map data | Last edited 20 August 2026. |
| Union | No map found | The clerk's November 2026 polling list has 15 precincts where the March 2026 results had 20, so the county appears to have merged precincts. | |
| Vermilion | Publishes it as data | map data | Last edited 10 March 2022. Its Danville city precincts are older than the ones Danville's own election commission uses now. The County Clerk also posts one PDF per precinct. |
| Wabash | Could not check | The county's website did not answer. | |
| Warren | Posts it as a PDF or picture | Draws only the City of Monmouth's precincts; the rural precincts are listed but not drawn. Posted July 2025. | |
| Washington | Posts it as a PDF or picture | PDF, page 35 | A small scanned map in the County Clerk's 2025-2026 Blue Book. |
| Wayne | No map found | The county's online map shows its townships, not its precincts. | |
| White | Posts it as a PDF or picture | A countywide map made February 2022. | |
| Whiteside | Publishes it as data | map data | Last edited 25 September 2026. |
| Will | Publishes it as data | map data | The 2022 precinct map. Last edited 8 September 2022. |
| Williamson | Posts it as a PDF or picture | A countywide map made November 2023, after the county changed its precincts that year. | |
| Winnebago | Publishes it as data | map data | Published by WinGIS, the regional mapping agency. Covers the county outside Rockford, which runs its own elections. |
| Woodford | Publishes it as data | map data | Published for the county by the Tri-County Regional Planning Commission. Last edited 17 July 2024. |
How we checked
For each county we read its own website: the county clerk's election pages, the county's GIS or map pages, and the documents those pages link to, opening any PDF that looked like a map. Where this site already reads a county's precinct map live, we read that map again the same day. We followed each website's robots.txt, and where a site refused automated readers, put up a challenge or a terms page, or did not answer, we stopped and marked the county could not check.
This is a snapshot, not a live check: each row describes what we found on 10 October 2026. A county may publish a map we missed, or may have published one since. If yours does, tell us and we will correct its row.
The law in question is section 11-6 of the Illinois Election Code (10 ILCS 5/11-6). Since 2014 it has asked each election authority to send the State Board a PDF map of its current precincts and to post it on any website it maintains, with a new map at least 90 days before the next election whenever its precincts change. It does not ask for the map as data. We did not check whether the State Board posts the maps it receives: its website asks automated readers to stay away, and we respect that.
Not for legal or official use. Boundary and roster data come from public
sources that explicitly disclaim legal precision. Confirm district assignments and
officeholders with the relevant government office before relying on them for anything
official.