# List of county courthouses in Illinois

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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 | Location | Year Built | Comments |
| Adams | Quincy 39°56′6″N 91°24′28″W﻿ / ﻿39.93500°N 91.40778°W﻿ / 39.93500; -91.40778﻿ (Adams County Courthouse) | 1950$^{:15}$ | Built to replace a former courthouse destroyed by a tornado$^{:15}$ |
| Alexander | Cairo 37°0′20″N 89°10′34″W﻿ / ﻿37.00556°N 89.17611°W﻿ / 37.00556; -89.17611﻿ (Alexander County Courthouse) | 1965 | Modernist building from the 1960s;$^{:16}$ one of two extant courthouses in Cairo, along with the Old Customhouse. Previous courthouse in Thebes is still standing |
| Bond | Greenville 38°53′33″N 89°24′46″W﻿ / ﻿38.89250°N 89.41278°W﻿ / 38.89250; -89.41278﻿ (Bond County Courthouse) | 1884$^{:19}$ | Bond County's fourth courthouse |
| Boone | Belvidere 42°15′54″N 88°50′42″W﻿ / ﻿42.26500°N 88.84500°W﻿ / 42.26500; -88.84500﻿ (Boone County Courthouse) | 1855$^{:20}$ | Second-oldest Illinois courthouse in continuous use;$^{:20}$ a cluster of three buildings combined into one |
| Brown‡ | Mount Sterling 39°59′12″N 90°45′51″W﻿ / ﻿39.98667°N 90.76417°W﻿ / 39.98667; -90.76417﻿ (Brown County Courthouse) | 1868$^{:21}$ | Neoclassical structure, almost completely destroyed by fire in 1939;$^{:21}$ restored post-fire with modifications |
| Bureau‡ | Princeton 41°22′5″N 89°27′57″W﻿ / ﻿41.36806°N 89.46583°W﻿ / 41.36806; -89.46583﻿ (Bureau County Courthouse) | 1936$^{:22}$ | Art Deco structure built by the WPA;$^{:22}$ functionally unchanged from original state |
| Calhoun | Hardin 39°9′25″N 90°37′6″W﻿ / ﻿39.15694°N 90.61833°W﻿ / 39.15694; -90.61833﻿ (Calhoun County Courthouse) | 1848$^{:23}$ | Expanded in 1978;$^{:23}$ built under direction of contractor William D. Hamilton |
| Carroll†‡ | Mount Carroll 42°6′3″N 89°58′42″W﻿ / ﻿42.10083°N 89.97833°W﻿ / 42.10083; -89.97833﻿ (Carroll County Courthouse) | 1858$^{:24}$ | Neoclassical structure;$^{:24}$ used continuously since 1856, at which time it was incomplete |
| Cass | Virginia 39°57′2″N 90°12′38″W﻿ / ﻿39.95056°N 90.21056°W﻿ / 39.95056; -90.21056﻿ (Cass County Courthouse) | 1875$^{:25}$ | Second courthouse in Virginia;$^{:25}$ substantially modified, including several expansions$^{:25}$ Previous courthouse in Beardstown still standing. |
| Champaign | Urbana 40°6′43″N 88°12′23″W﻿ / ﻿40.11194°N 88.20639°W﻿ / 40.11194; -88.20639﻿ (Champaign County Courthouse) | 1901$^{:27}$ | Romanesque Revival structure of stone with clock tower$^{:27}$ |
| Christian‡ | Taylorville 39°32′56″N 89°17′44″W﻿ / ﻿39.54889°N 89.29556°W﻿ / 39.54889; -89.29556﻿ (Christian County Courthouse) | 1901$^{:29}$ | County's third courthouse;$^{:29}$ features a central clock tower |
| Clark‡ | Marshall 39°23′24″N 87°41′46″W﻿ / ﻿39.39000°N 87.69611°W﻿ / 39.39000; -87.69611﻿ (Clark County Courthouse) | 1904$^{:30}$ | Fifth courthouse for the county;$^{:30}$ features a central clock tower |
| Clay† | Louisville 38°46′20″N 88°30′6″W﻿ / ﻿38.77222°N 88.50167°W﻿ / 38.77222; -88.50167﻿ (Clay County Courthouse) | 1912$^{:31}$ | Neoclassical structure, built under the guise of remodelling the previous courthouse;$^{:31}$ not substantially modified from original construction |
| Clinton | Carlyle 38°36′39″N 89°22′6″W﻿ / ﻿38.61083°N 89.36833°W﻿ / 38.61083; -89.36833﻿ (Clinton County Courthouse) | 1999$^{:32}$ | Replaced the 150-year-old previous courthouse$^{:32}$ |
| Coles† | Charleston 39°29′42″N 88°10′30″W﻿ / ﻿39.49500°N 88.17500°W﻿ / 39.49500; -88.17500﻿ (Coles County Courthouse) | 1898$^{:33}$ | Richardsonian Romanesque structure, one of the best in east central Illinois |
| Cook | Chicago 41°53′2″N 87°37′49″W﻿ / ﻿41.88389°N 87.63028°W﻿ / 41.88389; -87.63028﻿ (Cook County Courthouse) | 1965$^{:34}$ | Modernist skyscraper, the Richard J. Daley Center$^{:34}$ |
| Crawford | Robinson 39°0′19″N 87°44′22″W﻿ / ﻿39.00528°N 87.73944°W﻿ / 39.00528; -87.73944﻿ (Crawford County Courthouse) | 1896$^{:36}$ | Romanesque Revival structure built with a central tower;$^{:37}$ now towerless |
| Cumberland† | Toledo 39°16′22″N 88°14′41″W﻿ / ﻿39.27278°N 88.24472°W﻿ / 39.27278; -88.24472﻿ (Cumberland County Courthouse) | 1887$^{:38}$ | Italianate-influenced structure built on the site of the previous courthouse |
| DeKalb‡ | Sycamore 41°59′22″N 88°41′6″W﻿ / ﻿41.98944°N 88.68500°W﻿ / 41.98944; -88.68500﻿ (DeKalb County Courthouse) | 1905$^{:39}$ | Neoclassical structure with prominent pediment above entrance;$^{:39}$ functionally unchanged from original construction |
| DeWitt | Clinton 40°9′14″N 88°57′44″W﻿ / ﻿40.15389°N 88.96222°W﻿ / 40.15389; -88.96222﻿ (DeWitt County Courthouse) | 1986$^{:40}$ | Modernist structure$^{:40}$ |
| Douglas | Tuscola 39°47′45″N 88°17′7″W﻿ / ﻿39.79583°N 88.28528°W﻿ / 39.79583; -88.28528﻿ (Douglas County Courthouse) | 1913$^{:41}$ | Neoclassical structure;$^{:41}$ virtually unchanged from original state |
| DuPage | Wheaton 41°52′7″N 88°8′19″W﻿ / ﻿41.86861°N 88.13861°W﻿ / 41.86861; -88.13861﻿ (DuPage County Courthouse) | 1990$^{:43}$ | Part of a large Postmodernist office complex;$^{:42}$ previous courthouse is still standing |
| Edgar† | Paris 39°36′42″N 87°41′44″W﻿ / ﻿39.61167°N 87.69556°W﻿ / 39.61167; -87.69556﻿ (Edgar County Courthouse) | 1893$^{:45}$ | Romanesque Revival structure, octagonal in shape |
| Edwards | Albion 38°22′39″N 88°3′26″W﻿ / ﻿38.37750°N 88.05722°W﻿ / 38.37750; -88.05722﻿ (Edwards County Courthouse) | 1888$^{:47}$ | Brick structure with central clock tower;$^{:46}$ substantially altered since original construction |
| Effingham | Effingham 39°7′18″N 88°32′35″W﻿ / ﻿39.12167°N 88.54306°W﻿ / 39.12167; -88.54306﻿ (Effingham County Courthouse) | 2007$^{:48}$ | Modernist structure; previous courthouse is still standing$^{:48}$ |
| Fayette | Vandalia 38°57′36″N 89°5′58″W﻿ / ﻿38.96000°N 89.09944°W﻿ / 38.96000; -89.09944﻿ (Fayette County Courthouse) | Unknown | The Frederick Remann House, a converted and expanded farmhouse; previous courthouse was the old state capitol$^{:49}$ |
| Ford | Paxton 40°27′47″N 88°5′57″W﻿ / ﻿40.46306°N 88.09917°W﻿ / 40.46306; -88.09917﻿ (Ford County Courthouse) | 1908$^{:50}$ | Neoclassical structure with a copper dome;$^{:50}$ not substantially altered since construction |
| Franklin | Benton 37°59′48″N 88°55′14″W﻿ / ﻿37.99667°N 88.92056°W﻿ / 37.99667; -88.92056﻿ (Franklin County Courthouse) | 1874$^{:51}$ | Brick structure with one-story wings,$^{:51}$ added after construction |
| Fulton | Lewistown 40°23′49″N 90°9′20″W﻿ / ﻿40.39694°N 90.15556°W﻿ / 40.39694; -90.15556﻿ (Fulton County Courthouse) | 1897$^{:52}$ | Second Empire structure;$^{:52}$ built after the previous structure was destroyed by fire |
| Gallatin | Shawneetown 37°43′2″N 88°11′11″W﻿ / ﻿37.71722°N 88.18639°W﻿ / 37.71722; -88.18639﻿ (Gallatin County Courthouse) | 1939$^{:53}$ | Art Deco structure built after the previous courthouse and all Old Shawneetown was ruined by the Great Flood of 1937$^{:53}$ |
| Greene‡ | Carrollton 39°18′6″N 90°24′30″W﻿ / ﻿39.30167°N 90.40833°W﻿ / 39.30167; -90.40833﻿ (Greene County Courthouse) | 1892$^{:55}$ | Romanesque Revival structure;$^{:54}$ features clock tower at front |
| Grundy‡ | Morris 41°21′25″N 88°25′23″W﻿ / ﻿41.35694°N 88.42306°W﻿ / 41.35694; -88.42306﻿ (Grundy County Courthouse) | 1913$^{:56}$ | Stone structure with elaborate murals;$^{:56}$ built around the previous courthouse |
| Hamilton | McLeansboro 38°5′36″N 88°32′9″W﻿ / ﻿38.09333°N 88.53583°W﻿ / 38.09333; -88.53583﻿ (Hamilton County Courthouse) | 1938$^{:57}$ | Art Deco structure built by the WPA;$^{:57}$ no substantial modifications since construction |
| Hancock‡ | Carthage 40°24′47″N 91°8′7″W﻿ / ﻿40.41306°N 91.13528°W﻿ / 40.41306; -91.13528﻿ (Hancock County Courthouse) | 1908$^{:62}$ | Neoclassical structure;$^{:62}$ built with domed tower |
| Hardin | Elizabethtown 37°26′50″N 88°18′17″W﻿ / ﻿37.44722°N 88.30472°W﻿ / 37.44722; -88.30472﻿ (Hardin County Courthouse) | 1927$^{:63}$ | Brick structure built for less than $3,750;$^{:63}$ includes prominent 1923 war memorial |
| Henderson | Oquawka 40°56′8″N 90°57′12″W﻿ / ﻿40.93556°N 90.95333°W﻿ / 40.93556; -90.95333﻿ (Henderson County Courthouse) | 1842$^{:64}$ | Greek Revival structure;$^{:64}$ features four large columns at entrance |
| Henry† | Cambridge 41°18′8″N 90°11′48″W﻿ / ﻿41.30222°N 90.19667°W﻿ / 41.30222; -90.19667﻿ (Henry County Courthouse) | 1880$^{:65}$ | Second Empire structure;$^{:65}$ designed by prominent Indiana courthouse architect Thomas J. Tolan |
| Iroquois | Watseka 40°46′18″N 87°43′8″W﻿ / ﻿40.77167°N 87.71889°W﻿ / 40.77167; -87.71889﻿ (Iroquois County Courthouse) | 1966$^{:66}$ | Modernist structure built by donation;$^{:66}$ previous courthouse is still standing |
| Jackson† | Murphysboro 37°45′50″N 89°20′6″W﻿ / ﻿37.76389°N 89.33500°W﻿ / 37.76389; -89.33500﻿ (Jackson County Courthouse) | 1927$^{:68}$ | Neoclassical structure;$^{:68}$ built after its predecessor was destroyed in a tornado |
| Jasper | Newton 38°59′25″N 88°9′43″W﻿ / ﻿38.99028°N 88.16194°W﻿ / 38.99028; -88.16194﻿ (Jasper County Courthouse) | 1876$^{:69}$ | Extensively altered from original construction; built with a central clock tower$^{:69}$ |
| Jefferson | Mount Vernon 38°19′2″N 88°54′11″W﻿ / ﻿38.31722°N 88.90306°W﻿ / 38.31722; -88.90306﻿ (Jefferson County Courthouse) | 1939$^{:71}$ | Art Deco structure; built by the WPA;$^{:71}$ one of two extant courthouses in Mount Vernon, along with the Appellate Court, 5th District |
| Jersey†‡ | Jerseyville 39°7′9″N 90°19′45″W﻿ / ﻿39.11917°N 90.32917°W﻿ / 39.11917; -90.32917﻿ (Jersey County Courthouse) | 1893$^{:72}$ | Romanesque Revival structure of limestone; features a central tower$^{:72}$ |
| Jo Daviess‡ | Galena 42°25′6″N 90°25′32″W﻿ / ﻿42.41833°N 90.42556°W﻿ / 42.41833; -90.42556﻿ (Jo Daviess County Courthouse) | 1845$^{:73}$ | Originally a squarish brick building with a tower; remodelled by removing the tower and being greatly expanded to the rear$^{:73}$ |
| Johnson† | Vienna 37°24′52″N 88°53′47″W﻿ / ﻿37.41444°N 88.89639°W﻿ / 37.41444; -88.89639﻿ (Johnson County Courthouse) | 1871$^{:74}$ | Italianate square building;$^{:74}$ features cupola with public clock |
| Kane | Geneva 41°52′47″N 88°18′30″W﻿ / ﻿41.87972°N 88.30833°W﻿ / 41.87972; -88.30833﻿ (Kane County Courthouse) | 1993$^{:79}$ | Modernist structure, a contemporary office complex$^{:78}$ |
| Kankakee† | Kankakee 41°7′9″N 87°51′38″W﻿ / ﻿41.11917°N 87.86056°W﻿ / 41.11917; -87.86056﻿ (Kankakee County Courthouse) | 1912$^{:80}$ | Neoclassical structure;$^{:80}$ topped with a domed clock tower |
| Kendall | Yorkville 41°39′34″N 88°27′43″W﻿ / ﻿41.65944°N 88.46194°W﻿ / 41.65944; -88.46194﻿ (Kendall County Courthouse) | 2008$^{:81}$ | Postmodernist structure, a contemporary office complex;$^{:81}$ previous courthouse is still standing |
| Knox‡ | Galesburg 40°56′40″N 90°22′14″W﻿ / ﻿40.94444°N 90.37056°W﻿ / 40.94444; -90.37056﻿ (Knox County Courthouse) | 1887$^{:82}$ | Romanesque Revival structure of stone;$^{:82}$ previous courthouse in Knoxville is still standing |
| Lake | Waukegan 42°21′38″N 87°49′59″W﻿ / ﻿42.36056°N 87.83306°W﻿ / 42.36056; -87.83306﻿ (Lake County Courthouse) | 1967$^{:83}$ | Modernist small skyscraper; a contemporary office complex$^{:83}$ |
| LaSalle | Ottawa 41°20′46″N 88°50′32″W﻿ / ﻿41.34611°N 88.84222°W﻿ / 41.34611; -88.84222﻿ (LaSalle County Courthouse) | 1883$^{:85}$ | Romanesque Revival structure of stone;$^{:84}$ modified from its original form |
| Lawrence† | Lawrenceville 38°43′44″N 87°40′57″W﻿ / ﻿38.72889°N 87.68250°W﻿ / 38.72889; -87.68250﻿ (Lawrence County Courthouse) | 1888$^{:86}$ | Brick structure with octagonal clock tower;$^{:86}$ designed by the McDonald Brothers, architects for many Kentucky courthouses |
| Lee‡ | Dixon 41°50′32″N 89°28′53″W﻿ / ﻿41.84222°N 89.48139°W﻿ / 41.84222; -89.48139﻿ (Lee County Courthouse) | 1900$^{:88}$ | Neoclassical structure with Ionic columns; features a central dome$^{:88}$ |
| Livingston | Pontiac 40°52′48″N 88°37′45″W﻿ / ﻿40.88000°N 88.62917°W﻿ / 40.88000; -88.62917﻿ (Livingston County Courthouse) | 2011 | Replaced a previous courthouse that was preserved, a structure built around a central clock tower |
| Logan‡ | Lincoln 40°8′46″N 89°21′45″W﻿ / ﻿40.14611°N 89.36250°W﻿ / 40.14611; -89.36250﻿ (Logan County Courthouse) | 1905$^{:90}$ | Neoclassical structure with dome;$^{:90}$ not substantially modified since original construction. Previous courthouse in Mount Pulaski is still standing |
| Macon | Decatur 39°50′24″N 88°57′14″W﻿ / ﻿39.84000°N 88.95389°W﻿ / 39.84000; -88.95389﻿ (Macon County Courthouse) | 1940$^{:91}$ | Art Deco structure built by the WPA;$^{:91}$ not substantially modified since original construction |
| Macoupin‡ | Carlinville 39°16′45″N 89°52′45″W﻿ / ﻿39.27917°N 89.87917°W﻿ / 39.27917; -89.87917﻿ (Macoupin County Courthouse) | 1870$^{:92}$ | Neoclassical structure,$^{:93}$ the largest courthouse in the country upon its completion, and larger than the Old State Capitol in Springfield |
| Madison | Edwardsville 38°48′45″N 89°57′28″W﻿ / ﻿38.81250°N 89.95778°W﻿ / 38.81250; -89.95778﻿ (Madison County Courthouse) | 1913$^{:95}$ | Neo-Renaissance structure built of marble;$^{:95}$ the fourth courthouse to serve the county |
| Marion | Salem 38°37′39″N 88°56′42″W﻿ / ﻿38.62750°N 88.94500°W﻿ / 38.62750; -88.94500﻿ (Marion County Courthouse) | 1910$^{:97}$ | Neoclassical structure;$^{:96}$ not substantially modified since construction |
| Marshall | Lacon 41°1′30″N 89°24′28″W﻿ / ﻿41.02500°N 89.40778°W﻿ / 41.02500; -89.40778﻿ (Marshall County Courthouse) | 1853$^{:98}$ | Italianate structure;$^{:98}$ built as a Greek Revival structure but modified in the 1880s |
| Mason | Havana 40°18′2″N 90°3′42″W﻿ / ﻿40.30056°N 90.06167°W﻿ / 40.30056; -90.06167﻿ (Mason County Courthouse) | 1882$^{:99}$ | Greek Revival structure built to plans from 1851;$^{:99}$ expanded and greatly modified in the 1960s |
| Massac | Metropolis 37°9′7″N 88°43′59″W﻿ / ﻿37.15194°N 88.73306°W﻿ / 37.15194; -88.73306﻿ (Massac County Courthouse) | 1942$^{:101}$ | Neoclassical structure of brick;$^{:100}$ occupies site of previous courthouse |
| McDonough†‡ | Macomb 40°27′32″N 90°40′16″W﻿ / ﻿40.45889°N 90.67111°W﻿ / 40.45889; -90.67111﻿ (McDonough County Courthouse) | 1872$^{:102}$ | Second Empire structure; original mansard roof replaced after severe storm in 1890$^{:102}$ |
| McHenry | Woodstock 42°20′28″N 88°26′27″W﻿ / ﻿42.34111°N 88.44083°W﻿ / 42.34111; -88.44083﻿ (McHenry County Courthouse) | 1972$^{:103}$ | Modernist office complex;$^{:103}$ previous courthouse is still standing |
| McLean | Bloomington 40°28′40″N 88°59′39″W﻿ / ﻿40.47778°N 88.99417°W﻿ / 40.47778; -88.99417﻿ (McLean County Courthouse) | 1976$^{:104}$ | Modernist structure one block from the previous courthouse, which is still standing$^{:104}$ |
| Menard‡ | Petersburg 40°0′39″N 89°50′56″W﻿ / ﻿40.01083°N 89.84889°W﻿ / 40.01083; -89.84889﻿ (Menard County Courthouse) | 1898$^{:105}$ | Stone structure with timber framing;$^{:105}$ features a central dome |
| Mercer†‡ | Aledo 41°11′58″N 90°44′55″W﻿ / ﻿41.19944°N 90.74861°W﻿ / 41.19944; -90.74861﻿ (Mercer County Courthouse) | 1894$^{:110}$ | Romanesque Revival structure with central clock tower |
| Monroe‡ | Waterloo 38°20′9″N 90°8′58″W﻿ / ﻿38.33583°N 90.14944°W﻿ / 38.33583; -90.14944﻿ (Monroe County Courthouse) | 1851$^{:111}$ | Greek Revival structure; repeatedly expanded in the twentieth century$^{:111}$ |
| Montgomery | Hillsboro 39°9′40″N 89°29′36″W﻿ / ﻿39.16111°N 89.49333°W﻿ / 39.16111; -89.49333﻿ (Montgomery County Courthouse) | 1993$^{:112}$ | Postmodernist structure, a contemporary office complex;$^{:112}$ previous courthouse is still standing |
| Morgan† | Jacksonville 39°44′5″N 90°13′54″W﻿ / ﻿39.73472°N 90.23167°W﻿ / 39.73472; -90.23167﻿ (Morgan County Courthouse) | 1869$^{:114}$ | Italianate structure with Second Empire influences |
| Moultrie† | Sullivan 39°35′56″N 88°36′25″W﻿ / ﻿39.59889°N 88.60694°W﻿ / 39.59889; -88.60694﻿ (Moultrie County Courthouse) | 1904$^{:115}$ | Neoclassical structure with multiple Civil War monuments on the lawn |
| Ogle†‡ | Oregon 42°0′50″N 89°20′0″W﻿ / ﻿42.01389°N 89.33333°W﻿ / 42.01389; -89.33333﻿ (Ogle County Courthouse) | 1891$^{:116}$ | Romanesque Revival structure with tower;$^{:116}$ retains original oak interior |
| Peoria | Peoria 40°41′34″N 89°35′24″W﻿ / ﻿40.69278°N 89.59000°W﻿ / 40.69278; -89.59000﻿ (Peoria County Courthouse) | 1962$^{:117}$ | Modernist structure; occupies the site of two previous courthouses$^{:117}$ |
| Perry | Pinckneyville 38°4′50″N 89°22′55″W﻿ / ﻿38.08056°N 89.38194°W﻿ / 38.08056; -89.38194﻿ (Perry County Courthouse) | 1850$^{:119}$ | Built in several pieces; final portion built in 1939$^{:118}$ |
| Piatt‡ | Monticello 40°1′30″N 88°34′21″W﻿ / ﻿40.02500°N 88.57250°W﻿ / 40.02500; -88.57250﻿ (Piatt County Courthouse) | 1903$^{:120}$ | Neoclassical structure; features a dome with rotunda$^{:120}$ |
| Pike‡ | Pittsfield 39°36′26″N 90°48′19″W﻿ / ﻿39.60722°N 90.80528°W﻿ / 39.60722; -90.80528﻿ (Pike County Courthouse) | 1894$^{:121}$ | Gothic Revival structure; features a central clock tower$^{:121}$ |
| Pope‡ | Golconda 37°22′0″N 88°29′5″W﻿ / ﻿37.36667°N 88.48472°W﻿ / 37.36667; -88.48472﻿ (Pope County Courthouse) | 1873$^{:122}$ | Two-story gabled structure; replaced a structurally deficient previous courthouse$^{:122}$ |
| Pulaski | Mound City 37°5′23″N 89°9′44″W﻿ / ﻿37.08972°N 89.16222°W﻿ / 37.08972; -89.16222﻿ (Pulaski County Courthouse) | 1912$^{:123}$ | Three-story brick structure; badly damaged by the Great Flood of 1937$^{:123}$ |
| Putnam† | Hennepin 41°15′12″N 89°20′33″W﻿ / ﻿41.25333°N 89.34250°W﻿ / 41.25333; -89.34250﻿ (Putnam County Courthouse) | 1839$^{:124}$ | Greek Revival structure with Doric columns; oldest of all current Illinois courthouses |
| Randolph | Chester 37°54′13″N 89°49′42″W﻿ / ﻿37.90361°N 89.82833°W﻿ / 37.90361; -89.82833﻿ (Randolph County Courthouse) | 1972$^{:127}$ | Built around a spiral staircase with fountain in an atrium$^{:127}$ |
| Richland | Olney 38°43′51″N 88°5′8″W﻿ / ﻿38.73083°N 88.08556°W﻿ / 38.73083; -88.08556﻿ (Richland County Courthouse) | 1914$^{:129}$ | Neoclassical structure;$^{:128}$ not substantially modified since original construction |
| Rock Island | Rock Island 41°30′34″N 90°34′49″W﻿ / ﻿41.50944°N 90.58028°W﻿ / 41.50944; -90.58028﻿ (Rock Island County Courthouse) | 2001, 2018 | Five-story Modernist structure; replaced the 1896 courthouse in 2018 |
| St. Clair | Belleville 38°30′47″N 89°59′7″W﻿ / ﻿38.51306°N 89.98528°W﻿ / 38.51306; -89.98528﻿ (St. Clair County Courthouse) | 1976$^{:139}$ | Modernist structure with attached parking garage and plaza$^{:139}$ |
| Saline | Harrisburg 37°44′19″N 88°32′23″W﻿ / ﻿37.73861°N 88.53972°W﻿ / 37.73861; -88.53972﻿ (Saline County Courthouse) | 1967$^{:130}$ | Modernist structure, built of brick with few windows$^{:131}$ |
| Sangamon | Springfield 39°48′0″N 89°38′36″W﻿ / ﻿39.80000°N 89.64333°W﻿ / 39.80000; -89.64333﻿ (Sangamon County Courthouse) | 1991$^{:133}$ | Modernist structure; built after the county stopped using the old state capitol as its courthouse$^{:132–133}$ |
| Schuyler | Rushville 40°7′14″N 90°33′50″W﻿ / ﻿40.12056°N 90.56389°W﻿ / 40.12056; -90.56389﻿ (Schuyler County Courthouse) | 1882$^{:134}$ | Brick structure with corner clock tower and arcade$^{:134}$ |
| Scott‡ | Winchester 39°37′44″N 90°27′19″W﻿ / ﻿39.62889°N 90.45528°W﻿ / 39.62889; -90.45528﻿ (Scott County Courthouse) | 1885$^{:136}$ | Brick structure with onion dome atop tower;$^{:136}$ clock added to tower in 1917 |
| Shelby‡ | Shelbyville 39°24′25″N 88°47′27″W﻿ / ﻿39.40694°N 88.79083°W﻿ / 39.40694; -88.79083﻿ (Shelby County Courthouse) | 1881$^{:137}$ | Second Empire structure with clock tower; has an adjacent war memorial$^{:137}$ |
| Stark | Toulon 41°5′36″N 89°51′57″W﻿ / ﻿41.09333°N 89.86583°W﻿ / 41.09333; -89.86583﻿ (Stark County Courthouse) | 1856$^{:140}$ | Greek Revival structure built from the plans for the Marshall County Courthouse$^{:140}$ |
| Stephenson | Freeport 42°17′53″N 89°37′19″W﻿ / ﻿42.29806°N 89.62194°W﻿ / 42.29806; -89.62194﻿ (Stephenson County Courthouse) | 1974$^{:141}$ | Modernist structure with an adjacent Civil War memorial$^{:141}$ |
| Tazewell† | Pekin 40°34′10″N 89°38′52″W﻿ / ﻿40.56944°N 89.64778°W﻿ / 40.56944; -89.64778﻿ (Tazewell County Courthouse) | 1916$^{:142}$ | Neoclassical structure with a skylight central atrium |
| Union | Jonesboro 37°27′9″N 89°16′18″W﻿ / ﻿37.45250°N 89.27167°W﻿ / 37.45250; -89.27167﻿ (Union County Courthouse) | 2013 | Built beginning in 2012; previous courthouse, destroyed at the end of the project, was an extensively modified 1850s structure$^{:144}$ |
| Vermilion | Danville 40°7′29″N 87°37′46″W﻿ / ﻿40.12472°N 87.62944°W﻿ / 40.12472; -87.62944﻿ (Vermilion County Courthouse) | 1910$^{:145}$ | Five-story stone building;$^{:145}$ shaped like the letter "L" |
| Wabash | Mount Carmel 38°24′36″N 87°45′39″W﻿ / ﻿38.41000°N 87.76083°W﻿ / 38.41000; -87.76083﻿ (Wabash County Courthouse) | 1881$^{:147}$ | Modernist structure; technically the same building as the 1881 courthouse, but nothing remains of the original structure$^{:147}$ |
| Warren‡ | Monmouth 40°54′45″N 90°38′57″W﻿ / ﻿40.91250°N 90.64917°W﻿ / 40.91250; -90.64917﻿ (Warren County Courthouse) | 1895$^{:148}$ | Features central clock tower, reduced in height in 1970 for structural reasons$^{:148}$ |
| Washington | Nashville 38°20′39″N 89°22′59″W﻿ / ﻿38.34417°N 89.38306°W﻿ / 38.34417; -89.38306﻿ (Washington County Courthouse) | 1884$^{:149}$ | Third courthouse to serve the county; expanded in the 1960s$^{:149}$ |
| Wayne | Fairfield 38°22′48″N 88°21′26″W﻿ / ﻿38.38000°N 88.35722°W﻿ / 38.38000; -88.35722﻿ (Wayne County Courthouse) | 1891$^{:150}$ | Built with prominent tower on the facade; expanded in the 1950s$^{:150}$ |
| White | Carmi 38°5′28″N 88°9′32″W﻿ / ﻿38.09111°N 88.15889°W﻿ / 38.09111; -88.15889﻿ (White County Courthouse) | 1883$^{:151}$ | Third courthouse, built on the site of the second;$^{:151}$ first courthouse was the still-standing Robinson-Stewart House |
| Whiteside | Morrison 41°48′37″N 89°57′50″W﻿ / ﻿41.81028°N 89.96389°W﻿ / 41.81028; -89.96389﻿ (Whiteside County Courthouse) | 1987$^{:152}$ | Modernist structure, built of brick and glass$^{:152}$ |
| Will | Joliet 41°31′28″N 88°4′56″W﻿ / ﻿41.52444°N 88.08222°W﻿ / 41.52444; -88.08222﻿ (Will County Courthouse) | 1969$^{:153}$ | Modernist structure, built of concrete and glass$^{:153}$ |
| Williamson | Marion 37°43′57″N 88°55′45″W﻿ / ﻿37.73250°N 88.92917°W﻿ / 37.73250; -88.92917﻿ (Williamson County Courthouse) | 1971$^{:154}$ | Modernist brick structure; replaced a demolished 1889 courthouse on the public square$^{:154}$ |
| Winnebago | Rockford 42°16′18″N 89°5′47″W﻿ / ﻿42.27167°N 89.09639°W﻿ / 42.27167; -89.09639﻿ (Winnebago County Courthouse) | 1968$^{:155}$ | Modernist structure, augmented by a separate criminal justice center$^{:155}$ |
| Woodford | Eureka 40°43′19″N 89°16′20″W﻿ / ﻿40.72194°N 89.27222°W﻿ / 40.72194; -89.27222﻿ (Woodford County Courthouse) | 1898$^{:157}$ | Neoclassical structure; a slightly modified version of the Berrien County Courthouse in southwestern Michigan.$^{:157}$ Previous courthouse in Metamora is still standing |