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1680 - 1763 The State of Illinois was under the control of France.

1763 - 1783 The State of Illinois was controlled by Great Britain.

1800 - 1809 The State of Illinois was considered part of Indiana Territory.

1809 The State of Illinois became it's own territory.

Territorial censuses were taken in 1810 (as Indiana Territory) and in 1818 (as Illinois Territory). Only Randolph County survives for 1810.

Illinois Federal Census Records begin in 1820 and were enumerated every ten years, and include: 1820, 1830, 1840, 1850, 1860, 1870, 1880, 1900, 1910, 1920 and 1930.

Soundex Code Indexes for the Illinois Federal Census Records are available on microfilm for census years: 1880, 1900, 1910, and 1920.

1890 Illinois Federal Census Schedules, including the Veterans and Widows census, were completely destroyed by fire with the exception of McDonough County (partial).

Illinois state census and includes the following years: 1820, 1825, 1830, 1835, 1840, 1845, 1855, 1865.

The Illinois territorial census and Illinois state census records are located at:

Illinois State Archives
Archives Building
Springfield, Illinois 62756

Statewide Illinois Census Records Available Online:

Adams County:

Adams County was formed in 1825, from Pike County, County Seat - Quincy.

Adams County Illinois State Census Records

Adams County Illinois Mortality Schedules

Alexander County

Alexander County was formed in 1819, from Union County, County Seat - Cairo.

Alexander County Illinois State Census Records

Alexander County Illinois Mortality Schedules

Bond County

Bond County was formed in 1818, from Madison County, County Seat - Greenville.

Bond County Illinois Territory Census Records

Bond County Illinois State Census Records

Bond County Illinois Mortality Schedules

Boone County

Boone County was formed in 1836, from Winnebago County, County Seat - Belvidere.

Boone County Illinois State Census Records

Boone County Illinois Mortality Schedules

Brown County

Brown County was formed in 1837, from Schuyler County, County Seat - Mount Sterling.

Brown County Illinois Military Census Records

Bureau County

Bureau County was formed in 1837, from Putnam County, County Seat - Princeton.

Calhoun County

Calhoun County was formed in 1825, from Pike County, County Seat - Hardin.

Caroll County

Carroll County was formed in 1839, from Jo Daviess County, County Seat - Mount Carroll.

Cass County

Cass County was formed in 1837, form Morgan County, County Seat - Virginia.

Cass County Illinois Mortality Schedules

Champaign County

Champaign County was formed in 1833, from Vermilion County, County Seat - Urbana.

Cass County Illinois Mortality Schedules

Christian County

Christian County was formed in 1839, from Dane, Montgomery, Sangamon and Shelby Counties, County Seat - Taylorville.

Christian County Illinois Mortality Schedules

Clark County

Clark County was formed in 1819, from Crawford County, County Seat - Marshall.

Clark County Illinois State Census Records

Clark County Illinois Mortality Schedules

Clay County

Clay County was formed in 1824, from Crawford, Fayette, and Wayne Counties, County Seat - Louisville.

Clay County Illinois Mortality Schedules

Clinton County

Clinton County was formed in 1824 from Bond and Washington, County Seat - Carlyle.

Clinton County Illinois State Census Records

Clinton County Illinois Mortality Schedules

Coles County

Coles County was formed in 1830 from Clark and Edgar, County Seat - Charleston.

Coles County Illinois Military Census Records

Cook County

Cook County was formed in 1831 from Putnam County, County Seat - Chicago.

Crawford County

Crawford County was formed in 1816 from Edwards County, County Seat - Robinson.

Crawford County Illinois Territory Census Records

Crawford County Illinois State Census Records

Crawford County Illinois Substitute Census Records

Cumberland County

Cumberland County was formed in 1843 from Coles County, County Seat - Toledo.

Cumberland County Illinois State Census Records

Dekalb County

DeKalb County was formed in 1837 from Kane County, County Seat - Sycamore.

Dewitt County

DeWitt County was formed in 1839 from Macon and McLean Counties, County Seat - Clinton.

Douglas County

Douglas County was formed in 1859 from Coles County, County Seat - Tuscola.

Dupage County

DuPage County was formed in 1839 from Cook County, County Seat - Wheaton.

DuPage County Illinois Mortality Schedules

Edgar County

Edgar County was formed in 1823 from Clark County, County Seat - Paris.

Edwards County

Edwards County was formed in 1814 from Gallatin and Madison Counties, County Seat - Albion.

Edwards County Illinois State Census Records

Effingham County

Effingham County was formed in 1831 from Crawford and Fayette Counties, County Seat - Effingham.

Fayette County

Fayette County was formed in 1821 from Bond, Clark, Crawford and Jefferson Counties, County Seat - Vandalia.

Ford County

Ford County was formed in 1859 from Vermilion County, County Seat - Paxton.

Franklin County

Franklin County was formed in 1818 from Gallatin and White Counties - County Seat - Benton.

Franklin County Illinois Territory Census Records

Franklin County Illinois State Census Records

Fulton County

Fulton County was formed in 1823 from Pike County, County Seat - Lewistown.

Fulton County Illinois State Census Records

Gallatin County

Gallatin County was formed in 1812 from Randolph County, County Seat - Shawneetown.

Gallatin County Illinois Territory Census Records

Gallatin County Illinois State Census Records

Greene County

Greene County was formed in 1821 from Madison County, County Seat - Carrollton.

Greene County Illinois State Census Records

Greene County Illinois Mortality Schedules

Grundy County

Grundy County was formed in 1841 from LaSalle County, County Seat - Morris.

Hamilton County

Hamilton County was formed in 1821 from White County, County Seat - McLeansboro.

Hancock County

Hancock County was formed in 1825 from Pike County, County Seat - Carthage.

Hardin County

Hardin County was formed in 1839 from Gallatin and Pope Counties - County Seat - Elizabethtown.

Hardin County Illinois Mortality Schedules

Henderson County

Henderson County was formed in 1841 from Warren County, County Seat - Oquawka.

Henry County

Henry County was formed in 1825 from Fulton County, County Seat - Cambridge.

Iroquois County

Iroquois County was formed in 1833 from Vermilion County, County Seat - Watseka.

Jackson County

Jackson County was formed in 1816 from Johnson and Randolph Counties - County Seat - Murphysboro.

Jackson County Illinois Territory Census Records

Jackson County Illinois State Census Records

Jackson County Illinois Mortality Schedules

Jasper County

Jasper County was formed in 1831 from Clay and Crawford Counties - County Seat - Newton.

Jasper County Illinois State Census Records

Jasper County Illinois Mortality Schedules

Jefferson County

Jefferson County was formed in 1819 from Edwards and White Counties - County Seat - Mt. Vernon.

Jersey County

Jersey County was formed in 1839 from Greene County, County Seat - Jerseyville.

Jersey County Illinois State Census Records

Jodaviess County

JoDaviess County was formed in 1827 from Henry and Putnam Counties - County Seat - Galena.

Johnson County

Johnson County was formed in 1812 from Randolph County, County Seat - Vienna.

Johnson County Illinois Territory Census Records

Johnson County Illinois State Census Records

Johnson County Illinois Mortality Schedules

Kane County

Kane County was formed in 1836 from LaSalle and Cook Counties - County Seat - Geneva.

Kane County Illinois State Census Records

Kankakee County

Kankakee County was formed in 1853 from Ford, Iroquois and Will Counties - County Seat - Kankakee.

Kankakee County Illinois Mortality Schedules

Kendall County

Kendall County was formed in 1841 from LaSalle and Kane Counties - County Seat - Yorkville.

Knox County

Knox County was formed in 1825 from Fulton and Henry Counties - County Seat - Galesburg.

Lake County

Lake County was formed in 1839 from McHenry County, County Seat - Waukegan.

Lasalle County

LaSalle County was formed in 1831 from Putnam, and Tazewell Counties, County Seat - Ottawa.

Lawrence County

Lawrence County was formed in 1821 from Crawford and Edwards Counties, County Seat - Lawrenceville.

Lee County

Lee County was formed in 1839 from Ogle County, County Seat - Dixon.

Livingston County

Livingston County was formed in 1837 from LaSalle, McLean, and Vermilion? County Seat - Pontiac.

Logan County

Logan County was formed in 1839 from McLean, Sangamon and Tazewell, County Seat - Lincoln.

Logan County Illinois State Census Records

Macon County

Macon County was formed in 1829 from Shelby, County Seat - Decatur.

Macoupin County

Macoupin County was formed in 1829 from Greene and Madison Counties - County Seat - Carlinville.

Madison County

Madison County was formed in 1812 from St. Clair County - County Seat - Edwardsville.

Madison County Illinois Territory Census Records

Marion County

Marion County was formed in 1823 from Fayette and Jefferson Counties - County Seat - Salem.

Marshall County

Marshall County was formed in 1839 from Putnam and LaSalle Counties - County Seat - Lacon.

Mason County

Mason County was formed in 1841 from Menard and Tazewell Counties - County Seat - Havana.

Massac County

Massac County was formed in 1843 from Johnson and Pope Counties - County Seat - Metropolis.

McDonough County

McDonough County was formed in 1826 from Schuyler County - County Seat - Macomb.

McHenry County

McHenry County was formed in 1836 from Cook, and LaSalle Counties - County Seat - Woodstock.

McLean County

McLean County was formed in 1830 from Tazewell County - County Seat - Bloomington.

Menard County

Menard County was formed in 1839 from Sangamon County - County Seat - Petersburg.

Mercer County

Mercer County was formed in 1825 from Pike County - County Seat - Aledo.

Monroe County

Monroe County was formed in 1816 from Randolph and St. Clair County - County Seat - Waterloo.

Monroe County Illinois Territory Census

Monroe County Illinois State Census

Montgomery County

Montgomery County was formed in 1821 from Bond and Madison Counties - County Seat - Hillsboro.

Montgomery County Illinois State Census Records

Morgan County

Morgan County was formed in 1823 from Greene and Sangamon Counties - County Seat - Jacksonville.

Moultrie County

Moultrie County was formed in 1843 from Macon and Shelby Counties - County Seat - Sullivan.

Ogle County

Ogle County was formed in 1836 from Jo Daviess and LaSalle Counties - County Seat - Oregon.

Peoria County

Peoria County was formed in 1825 from Fulton County - County Seat - Peoria.

Perry County

Perry County was formed in 1827 from Jackson and Randolph Counties - County Seat - Pickneyville.

Perry County Illinois State Census Records

Piatt County

Piatt County was formed in 1841 from DeWitt and Macon Counties - County Seat - Monticello.

Pike County

Pike County was formed in 1821 from Madison County - County Seat - Pittsfield.

Pope County

Pope County was formed in 1816 from Gallatin and Johnson Counties - County Seat - Golconda.

Pope County Illinois Territory Census Records

Pope County Illinois State Census Records

Pulaski County

Pulaski was formed in 1843 from Alexander and Johnson Counties - County Seat - Mound City.

Putnam County

Putnam County was formed in 1825 from Edgar and Fulton Counties - County Seat - Hennepin.

Randolph County

Randolph County was formed in 1795 from St. Clair County and Northwest Territory, County Seat - Chester.

Randolph County Illinois Territory Census Records

Randolph County Illinois State Census Records

Richland County

Richland County was formed in 1841 from Clay and Lawrence Counties, County Seat - Olney.

Rock Island County

Rock Island County was formed in 1831 from Jo Daviess County, County Seat - Rock Island.

Saline County

Saline County was formed in 1847 from Gallatin County, County Seat - Harrisburg.

Sangamon County

Sangamon County was formed in 1821 from Bond and Madison County, County Seat - Springfield.

Schuyler County

Schuyler County was formed in 1825 from Pike County, County Seat - Rushville.

Scott County

Scott County was formed in 1839 from Morgan County, County Seat - Winchester.

Shelby County

Shelby County was formed in 1827 from Fayette County, County Seat - Shelbyville.

Stark County

Stark County was formed in 1839 from Knox and Putnam Counties, County Seat - Toulon.

St. Clair County

St. Clair County was formed in 1790 from part of the Northwest Territory County Seat - Belleville.

St. Clair County Illinois Territory Census Records

Stephenson County

Stephenson County was formed in 1837 from Jo Daviess and Winnebago Counties, County Seat - Freeport.

Tazewell County

Tazewell County was formed in 1827 from Peoria and Fayette Counties, County Seat - Pekin.

Union County

Union County was formed in 1818 from Johnson and Jackson Counties, County Seat - Jonesboro.

Union County Illinois Territory Census Records

Union County Illinois State Census Records

Vermilion County

Vermilion County was formed in 1826 from Edgar County, County Seat - Danville.

Wabash County

Wabash County was formed in 1824 from Edwards County, County Seat - Mount Carmel.

Warren County

Warren County was formed in 1825 from Pike County, County Seat - Monmouth.

Washington County

Washington County was formed in 1818 from St. Clair County, County Seat - Nashville.

Washington County Illinois Territory Census Records

Washington County Illinois State Census Records

Wayne County

Wayne County was formed in 1819 from Edwards County, County Seat - Fairfield.

Wayne County Illinois State Census Records

White County

White County was formed in 1815 from Madison County, County Seat - Carmi.

White County Illinois Territory Census Records

White County Illinois State Census Records

Whiteside County

Whiteside County was formed in 1836 from Jo Daviess and Henry Counties, County Seat -Morrison.

Will County

Will County was formed in 1836 from Cook and Iroquois Counties, County Seat -Joliet.

Williamson County

Williamson County was formed in 1839 from Franklin County, County Seat - Marion.

Winnebago County

Winnebago County was formed in 1836 from JoDaviess and LaSalle Counties, County Seat - Rockford.

Woodford County

Woodford County was formed in 1841 from McLean and Tazewell Counties, County Seat - Eureka.


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