Illinois County Coordinates
Compiled by: Alex Wenner & Marian Hunter
Northern Illinois University, Map Library, DeKalb
| County | West | East | North | South |
|---|---|---|---|---|
| Adams | W 91 030´ | W 90 055´ | N 40 012´ | N 39 045´ |
| Alexander | W 89 031´ | W 89 008´ | N 37 020´ | N 36 058´ |
| Bond | W 89 038´ | W 89 015´ | N 39 002´ | N 38 045´ |
| Boone | W 88 056´ | W 88 042´ | N 42 030´ | N 42 009´ |
| Brown | W 90 055´ | W 90 031´ | N 40 006´ | N 39 050´ |
| Bureau | W 89 052´ | W 89 010´ | N 41 035´ | N 41 009´ |
| Calhoun | W 90 056´ | W 90 027´ | N 38 024´ | N 38 052´ |
| Carroll | W 90 019´ | W 89 041´ | N 42 012´ | N 41 056´ |
| Cass | W 90 035´ | W 90 000´ | N 40 008´ | N 39 053´ |
| Champaign | W 88 028´ | W 87 056´ | N 40 024´ | N 38 053´ |
| Christian | W 89 032´ | W 89 012´ | N 38 050´ | N 39 021´ |
| Clark | W 88 001´ | W 87 031´ | N 39 029´ | N 39 010´ |
| Clay | W 88 042´ | W 88 015´ | N 38 055´ | N 38 036´ |
| Clinton | W 89 042´ | W 89 009´ | N 38 045´ | N 38 025´ |
| Coles | W 88 028´ | W 87 058´ | N 39 041´ | N 39 022´ |
| Cook | W 88 016´ | W 87 031´ | N 42 009´ | N 41 027´ |
| Crawford | W 87 057´ | W 87 031´ | N 39 010´ | N 38 051´ |
| Cumberland | W 88 028´ | W 88 000´ | N 39 023´ | N 39 010´ |
| DeKalb | W 88 056´ | W 88 035´ | N 42 009´ | N 41 038´ |
| DeWitt | W 89 009´ | W 88 035´ | N 40 017´ | N 40 004´ |
| Douglas | W 88 028´ | W 87 056´ | N 39 053´ | N 39 039´ |
| DuPage | W 88 028´ | W 87 055´ | N 42 000´ | N 41 041´ |
| Edgar | W 87 058´ | W 87 032´ | N 39 003´ | N 39 028´ |
| Edwards | W 88 009´ | W 87 056´ | N 38 034´ | N 38 015´ |
| Effingham | W 88 048´ | W 88 022´ | N 39 013´ | N 38 055´ |
| Fayette | W 89 015´ | W 88 042´ | N 39 013´ | N 38 044´ |
| Ford | W 88 028´ | W 87 056´ | N 41 000´ | N 40 024´ |
| Franklin | W 89 010´ | W 88 042´ | N 38 007´ | N 37 052´ |
| Fulton | W 90 026´ | W 89 053´ | N 40 043´ | N 40 011´ |
| Gallatin | W 88 022´ | W 88 001´ | N 37 055´ | N 37 035´ |
| Green | W 90 037´ | W 90 009´ | N 39 032´ | N 39 007´ |
| Grundy | W 88 036´ | W 88 015´ | N 41 028´ | N 41 007´ |
| Hamilton | W 88 042´ | W 88 022´ | N 38 015´ | N 37 054´ |
| Hancock | W 91 030´ | W 90 055´ | N 40 038´ | N 40 011´ |
| Hardin | W 88 025´ | W 88 004´ | N 37 036´ | N 37 025´ |
| Henderson | W 91 011´ | W 90 047´ | N 41 004´ | N 40 038´ |
| Henry | W 90 026´ | W 89 052´ | N 41 035´ | N 41 009´ |
| Iroquois | W 88 008´ | W 87 031´ | N 41 035´ | N 40 029´ |
| Jackson | W 89 041´ | W 89 009´ | N 37 057´ | N 37 034´ |
| Jasper | W 88 022´ | W 87 057´ | N 39 010´ | N 38 051´ |
| Jefferson | W 89 009´ | W 88 042´ | N 38 028´ | N 38 007´ |
| Jersey | W 90 036´ | W 90 009´ | N 39 016´ | N 38 055´ |
| Jo Daviess | W 90 040´ | W 89 055´ | N 42 030´ | N 42 012´ |
| Johnson | W 89 003´ | W 88 042´ | N 37 036´ | N 37 018´ |
| Kane | W 88 036´ | W 88 014´ | N 42 009´ | N 41 043´ |
| Kankakee | W 88 015´ | W 87 031´ | N 41 018´ | N 41 000´ |
| Kendall | W 88 036´ | W 88 015´ | N 41 043´ | N 41 027´ |
| Knox | W 90 026´ | W 89 059´ | N 41 009´ | N 40 043´ |
| Lake | W 88 012´ | W 87 045´ | N 42 030´ | N 42 009´ |
| La Salle | W 89 010´ | W 88 035´ | N 41 038´ | N 40 055´ |
| Lawrence | W 87 054´ | W 87 030´ | N 38 051´ | N 38 034´ |
| Lee | W 89 037´ | W 88 056´ | N 41 054´ | N 41 035´ |
| Livingston | W 88 056´ | W 88 015´ | N 41 007´ | N 40 037´ |
| Logan | W 89 036´ | W 89 009´ | N 42 019´ | N 39 055´ |
| Macon | W 89 013´ | W 88 045´ | N 40 004´ | N 39 039´ |
| Macoupin | W 90 009´ | W 89 042´ | N 39 032´ | N 39 000´ |
| Madison | W 90 017´ | W 89 036´ | N 39 000´ | N 38 039´ |
| Marion | W 89 009´ | W 88 042´ | N 38 050´ | N 38 028´ |
| Marshall | W 89 038´ | W 89 003´ | N 41 009´ | N 40 055´ |
| Mason | W 90 021´ | W 89 036´ | N 40 027´ | N 40 003´ |
| Massac | W 88 056´ | W 88 029´ | N 37 020´ | N 37 004´ |
| McDonough | W 90 055´ | W 90 026´ | N 40 038´ | N 40 017´ |
| McHenry | W 82 042´ | W 88 012´ | N 42 030´ | N 40 009´ |
| McLean | W 89 016´ | W 88 028´ | N 40 045´ | N 40 017´ |
| Menard | W 90 000´ | W 89 035´ | N 40 010´ | N 39 054´ |
| Mercer | W 91 007´ | W 90 026´ | N 41 020´ | N 41 004´ |
| Monroe | W 90 022´ | W 89 054´ | N 38 032´ | N 38 005´ |
| Montgomery | W 89 042´ | W 89 008´ | N 39 032´ | N 39 000´ |
| Morgan | W 90 036´ | W 89 055´ | N 39 053´ | N 39 032´ |
| Moultrie | W 88 049´ | W 88 028´ | N 39 048´ | N 39 026´ |
| Ogle | W 89 041´ | W 88 056´ | N 42 012´ | N 41 053´ |
| Peoria | W 89 059´ | W 89 026´ | N 40 059´ | N 40 031´ |
| Perry | W 89 036´ | W 89 007´ | N 38 0l3´ | N 37 057´ |
| Piatt | W 89 045´ | W 88 028´ | N 40 017´ | N 39 048´ |
| Pike | W 91 022´ | W 90 034´ | N 39 050´ | N 39 024´ |
| Pope | W 88 042´ | W 88 025´ | N 37 036´ | N 37 004´ |
| Pulaski | W 89 017´ | W 88 056´ | N 37 02O´ | N 37 003´ |
| Putnam | W 89 028´ | W 89 010´ | N 41 019´ | N 41 006´ |
| Randolph | W 90 013´ | W 89 036´ | N 38 013´ | N 37 047´ |
| Richland | W 88 018´ | W 87 054´ | N 38 05l´ | N 38 034´ |
| Rock Island | W 91 005´ | W 90 010´ | N 41 047´ | N 41 020´ |
| St. Clair | W 90 016´ | W 89 042´ | N 38 039´ | N 38 013´ |
| Saline | W 88 042´ | W 88 022´ | N 37 054´ | N 37 036´ |
| Sangamon | W 90 000´ | W 89 013´ | N 39 059´ | N 39 032´ |
| Schuyler | W 90 055´ | W 90 012´ | N 40 017´ | N 39 058´ |
| Scott | W 90 039´ | W 90 018´ | N 39 048´ | N 39 032´ |
| Shelby | W 89 008´ | W 88 028´ | N 39 039´ | N 39 013´ |
| Stark | W 89 059´ | W 89 039´ | N 41 014´ | N 40 059´ |
| Stephenson | W 89 055´ | W 89 024´ | N 42 030´ | N 42 012´ |
| Tazewell | W 89 055´ | W 89 016´ | N 40 045´ | N 40 019´ |
| Union | W 89 031´ | W 89 003´ | N 37 036´ | N 37 020´ |
| Vermilion | W 87 056´ | W 87 031´ | N 40 029´ | N 39 052´ |
| Wabash | W 87 059´ | W 87 039´ | N 38 034´ | N 38 014´ |
| Warren | W 90 047´ | W 90 026´ | N 41 004´ | N 40 038´ |
| Washington | W 89 042´ | W 89 009´ | N 38 031´ | N 38 012´ |
| Wayne | W 88 043´ | W 88 009´ | N 38 037´ | N 38 015´ |
| White | W 88 022´ | W 87 054´ | N 38 015´ | N 37 053´ |
| Whiteside | W 90 015´ | W 89 037´ | N 41 056´ | N 41 035´ |
| Will | W 88 016´ | W 87 031´ | N 41 044´ | N 41 012´ |
| Williamson | W 89 009´ | W 88 042´ | N 37 052´ | N 37 036´ |
| Winnebago | W 89 024´ | W 88 056´ | N 42 030´ | N 42 010´ |
| Woodford | W 89 033´ | W 88 055´ | N 40 055´ | N 40 036´ |
