List of county courthouses in Illinois
This list of county courthouses in Illinois provides information about each current Illinois county courthouse: name, photograph, city, construction year, and further comments.
Each of the 102 county governments in the U.S. state of Illinois operates out of a building or complex of buildings known as the county's courthouse. The community in which the courthouse is located is known as the county seat. The oldest current courthouse is the Putnam County Courthouse, built in 1839, while other courthouses have been built since 2010. Many courthouses were built following the destruction of previous buildings, either planned or unplanned; however, some former courthouses still stand, many of which have been repurposed as museums or as offices for other governmental agencies.
Fifty-seven of these courthouses were constructed between the end of the Civil War and American entry into the First World War; extant courthouses from this period tend to reflect the Romanesque Revival, Second Empire, and Neoclassical architectural styles, while several older courthouses are Greek Revival buildings, and many twentieth-century courthouses are modernist structures.
List
Thirty-eight courthouses in the state either are listed on the National Register of Historic Places or are located within Register-listed historic districts; these are marked with a †dagger or ‡double dagger respectively, or with both if applicable.| Courthouse | Image | Location | Year | Comments |
| Adams | Quincy | 1950 | Built to replace a former courthouse destroyed by a tornado | |
| Alexander | Cairo | 1965 | Modernist building from the 1960s; one of two extant courthouses in Cairo, along with the Old Customhouse. Previous courthouse in Thebes is still standing | |
| Bond | Greenville | 1884 | Bond County's fourth courthouse | |
| Boone | Belvidere | 1855 | Second-oldest Illinois courthouse in continuous use; a cluster of three buildings combined into one | |
| Brown‡ | Mount Sterling | 1868 | Neoclassical structure, almost completely destroyed by fire in 1939; restored post-fire with modifications | |
| Bureau‡ | Princeton | 1936 | Art Deco structure built by the WPA; functionally unchanged from original state | |
| Calhoun | Hardin | 1848 | Expanded in 1978; built under direction of contractor William D. Hamilton | |
| Carroll†‡ | Mount Carroll | 1858 | Neoclassical structure; used continuously since 1856, at which time it was incomplete | |
| Cass | Virginia | 1875 | Second courthouse in Virginia; substantially modified, including several expansions | |
| Champaign | Urbana | 1901 | Romanesque Revival structure of stone with clock tower | |
| Christian‡ | Taylorville | 1901 | County's third courthouse; features a central clock tower | |
| Clark‡ | Marshall | 1904 | Fifth courthouse for the county; features a central clock tower | |
| Clay† | Louisville | 1912 | Neoclassical structure, built under the guise of remodelling the previous courthouse; not substantially modified from original construction | |
| Clinton | Carlyle | 1999 | Replaced the 150-year-old previous courthouse | |
| Coles† | Charleston | 1898 | Richardsonian Romanesque structure, one of the best in east central Illinois | |
| Cook | Chicago | 1965 | Modernist skyscraper, the Richard J. Daley Center | |
| Crawford | Robinson | 1896 | Romanesque Revival structure built with a central tower; now towerless | |
| Cumberland† | Toledo | 1887 | Italianate-influenced structure built on the site of the previous courthouse | |
| DeKalb‡ | Sycamore | 1905 | Neoclassical structure with prominent pediment above entrance; functionally unchanged from original construction | |
| DeWitt | Clinton | 1986 | Modernist structure | |
| Douglas | Tuscola | 1913 | Neoclassical structure; virtually unchanged from original state | |
| DuPage | Wheaton | 1990 | Part of a large Postmodernist office complex; previous courthouse is still standing | |
| Edgar† | Paris | 1893 | Romanesque Revival structure, octagonal in shape | |
| Edwards | Albion | 1888 | Brick structure with central clock tower; substantially altered since original construction | |
| Effingham | Effingham | 2007 | Modernist structure; previous courthouse is still standing | |
| Fayette | Vandalia | Unknown | The Frederick Remann House, a converted and expanded farmhouse; previous courthouse was the old state capitol | |
| Ford | Paxton | 1908 | Neoclassical structure with a copper dome; not substantially altered since construction | |
| Franklin | Benton | 1874 | Brick structure with one-story wings, added after construction | |
| Fulton | Lewistown | 1897 | Second Empire structure; built after the previous structure was destroyed by fire | |
| Gallatin | Shawneetown | 1939 | Art Deco structure built after the previous courthouse and all Old Shawneetown was ruined by the Great Flood of 1937 | |
| Greene‡ | Carrollton | 1892 | Romanesque Revival structure; features clock tower at front | |
| Grundy‡ | Morris | 1913 | Stone structure with elaborate murals; built around the previous courthouse | |
| Hamilton | McLeansboro | 1938 | Art Deco structure built by the WPA; no substantial modifications since construction | |
| Hancock‡ | Carthage | 1908 | Neoclassical structure; built with domed tower | |
| Hardin | Elizabethtown | 1927 | Brick structure built for less than $3,750; includes prominent 1923 war memorial | |
| Henderson | Oquawka | 1842 | Greek Revival structure; features four large columns at entrance | |
| Henry† | Cambridge | 1880 | Second Empire structure; designed by prominent Indiana courthouse architect Thomas J. Tolan | |
| Iroquois | Watseka | 1966 | Modernist structure built by donation; previous courthouse is still standing | |
| Jackson† | Murphysboro | 1927 | Neoclassical structure; built after its predecessor was destroyed in a tornado | |
| Jasper | Newton | 1876 | Extensively altered from original construction; built with a central clock tower | |
| Jefferson | Mount Vernon | 1939 | Art Deco structure; built by the WPA; one of two extant courthouses in Mount Vernon, along with the Appellate Court, 5th District | |
| Jersey†‡ | Jerseyville | 1893 | Romanesque Revival structure of limestone; features a central tower | |
| Jo Daviess‡ | Galena | 1845 | Originally a squarish brick building with a tower; remodelled by removing the tower and being greatly expanded to the rear | |
| Johnson† | Vienna | 1871 | Italianate square building; features cupola with public clock | |
| Kane | Geneva | 1993 | Modernist structure, a contemporary office complex | |
| Kankakee† | Kankakee | 1912 | Neoclassical structure; topped with a domed clock tower | |
| Kendall | Yorkville | 2008 | Postmodernist structure, a contemporary office complex; previous courthouse is still standing | |
| Knox‡ | Galesburg | 1887 | Romanesque Revival structure of stone; previous courthouse in Knoxville is still standing | |
| Lake | Waukegan | 1967 | Modernist small skyscraper; a contemporary office complex | |
| LaSalle | Ottawa | 1883 | Romanesque Revival structure of stone; modified from its original form | |
| Lawrence† | Lawrenceville | 1888 | Brick structure with octagonal clock tower; designed by the McDonald Brothers, architects for many Kentucky courthouses | |
| Lee‡ | Dixon | 1900 | Neoclassical structure with Ionic columns; features a central dome | |
| Livingston | Pontiac | 2011 | Replaced a previous courthouse that was preserved, a structure built around a central clock tower | |
| Logan‡ | Lincoln | 1905 | Neoclassical structure with dome; not substantially modified since original construction. Previous courthouse in Mount Pulaski is still standing | |
| Macon | Decatur | 1940 | Art Deco structure built by the WPA; not substantially modified since original construction | |
| Macoupin‡ | Carlinville | 1870 | Neoclassical structure, the largest courthouse in the country upon its completion, and larger than the Old State Capitol in Springfield | |
| Madison | Edwardsville | 1913 | Neo-Renaissance structure built of marble; the fourth courthouse to serve the county | |
| Marion | Salem | 1910 | Neoclassical structure; not substantially modified since construction | |
| Marshall | Lacon | 1853 | Italianate structure; built as a Greek Revival structure but modified in the 1880s | |
| Mason | Havana | 1882 | Greek Revival structure built to plans from 1851; expanded and greatly modified in the 1960s | |
| Massac | Metropolis | 1942 | Neoclassical structure of brick; occupies site of previous courthouse | |
| McDonough†‡ | Macomb | 1872 | Second Empire structure; original mansard roof replaced after severe storm in 1890 | |
| McHenry | Woodstock | 1972 | Modernist office complex; previous courthouse is still standing | |
| McLean | Bloomington | 1976 | Modernist structure one block from the previous courthouse, which is still standing | |
| Menard‡ | Petersburg | 1898 | Stone structure with timber framing; features a central dome | |
| Mercer†‡ | Aledo | 1894 | Romanesque Revival structure with central clock tower | |
| Monroe‡ | Waterloo | 1851 | Greek Revival structure; repeatedly expanded in the twentieth century | |
| Montgomery | Hillsboro | 1993 | Postmodernist structure, a contemporary office complex; previous courthouse is still standing | |
| Morgan† | Jacksonville | 1869 | Italianate structure with Second Empire influences | |
| Moultrie† | Sullivan | 1904 | Neoclassical structure with multiple Civil War monuments on the lawn | |
| Ogle†‡ | Oregon | 1891 | Romanesque Revival structure with tower; retains original oak interior | |
| Peoria | Peoria | 1962 | Modernist structure; occupies the site of two previous courthouses | |
| Perry | Pinckneyville | 1850 | Built in several pieces; final portion built in 1939 | |
| Piatt‡ | Monticello | 1903 | Neoclassical structure; features a dome with rotunda | |
| Pike‡ | Pittsfield | 1894 | Gothic Revival structure; features a central clock tower | |
| Pope‡ | Golconda | 1873 | Two-story gabled structure; replaced a structurally deficient previous courthouse | |
| Pulaski | Mound City | 1912 | Three-story brick structure; badly damaged by the Great Flood of 1937 | |
| Putnam† | Hennepin | 1839 | Greek Revival structure with Doric columns; oldest of all current Illinois courthouses | |
| Randolph | Chester | 1972 | Built around a spiral staircase with fountain in an atrium | |
| Richland | Olney | 1914 | Neoclassical structure; not substantially modified since original construction | |
| Rock Island | Rock Island | 2001, 2018 | Five-story Modernist structure; replaced the 1896 courthouse in 2018 | |
| St. Clair | Belleville | 1976 | Modernist structure with attached parking garage and plaza | |
| Saline | Harrisburg | 1967 | Modernist structure, built of brick with few windows | |
| Sangamon | Springfield | 1991 | Modernist structure; built after the county stopped using the old state capitol as its courthouse | |
| Schuyler | Rushville | 1882 | Brick structure with corner clock tower and arcade | |
| Scott‡ | Winchester | 1885 | Brick structure with onion dome atop tower; clock added to tower in 1917 | |
| Shelby‡ | Shelbyville | 1881 | Second Empire structure with clock tower; has an adjacent war memorial | |
| Stark | Toulon | 1856 | Greek Revival structure built from the plans for the Marshall County Courthouse | |
| Stephenson | Freeport | 1974 | Modernist structure with an adjacent Civil War memorial | |
| Tazewell† | Pekin | 1916 | Neoclassical structure with a skylight central atrium | |
| Union | Jonesboro | 2013 | Built beginning in 2012; previous courthouse, destroyed at the end of the project, was an extensively modified 1850s structure | |
| Vermilion | Danville | 1910 | Five-story stone building; shaped like the letter "L" | |
| Wabash | Mount Carmel | 1881 | Modernist structure; technically the same building as the 1881 courthouse, but nothing remains of the original structure | |
| Warren‡ | Monmouth | 1895 | Features central clock tower, reduced in height in 1970 for structural reasons | |
| Washington | Nashville | 1884 | Third courthouse to serve the county; expanded in the 1960s | |
| Wayne | Fairfield | 1891 | Built with prominent tower on the facade; expanded in the 1950s | |
| White | Carmi | 1883 | Third courthouse, built on the site of the second; first courthouse was the still-standing Robinson-Stewart House | |
| Whiteside | Morrison | 1987 | Modernist structure, built of brick and glass | |
| Will | Joliet | 1969 | Modernist structure, built of concrete and glass | |
| Williamson | Marion | 1971 | Modernist brick structure; replaced a demolished 1889 courthouse on the public square | |
| Winnebago | Rockford | 1968 | Modernist structure, augmented by a separate criminal justice center | |
| Woodford | Eureka | 1898 | Neoclassical structure; a slightly modified version of the Berrien County Courthouse in southwestern Michigan. Previous courthouse in Metamora is still standing |