State Census Records Available at the Illinois State Archives

State Census Records
Available at the Illinois State Archives

1820 includes 18 of the 19 counties at the time

Alexander, Bond, Clark, Crawford, Franklin, Gallatin, Jackson, Jefferson, Johnson, Madison, Monroe, Pope, Randolph, St Clair, Union, Washington, Wayne, White

1825 includes 3 or the 43 counties at the time

Edwards, Fulton, Randolph

1830 includes 1 of the 51 counties at the time

Morgan

1835 includes 4 of the 60 counties at the time

Fayette, Fulton, Jasper, Morgan

1840 includes 35 of the 87 counties at the time

Adams, Bond, Brown, Calhoun, Champaign, Clark, Clay, Clinton, Coles, Cook, Crawford, Edgar, Effingham, Franklin, Fulton, Hamilton, Hardin, Jackson, Jasper, Jo Daviess, Johnson, Knox, LaSalle, Lawrence, Livingston, Monroe, Randolph, Rock Island, Schuyler, Stark, Tazewell, Union, Vermilion, White, Whiteside

1845 includes 3 of the 98 counties at the time

Cass, Putnam, Tazewell

1855 includes 90 of the 100 counties at the time

Adams, Alexander, Bond, Boone, Brown, Bureau, Calhoun, Cass, Christian, Clark, Clay, Clinton, Coles, Cook, Crawford, Cumberland, DeKalb, DeWitt, DuPage, Edgar, Edwards, Effingham, Fayette, Fulton, Greene, Grundy, Hamilton, Hancock, Hardin, Henderson, Iroquois, Jackson, Jasper, Jersey, Jo Daviess, Johnson, Kane, Kankakee, Kendall, Knox, LaSalle, Lawrence, Lee, Livingston, Logan, McDonough, McHenry, McLean, Macon, Macoupin, Madison, Marion, Marshall, Mason, Massac, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Ogle, Peoria, Perry, Piatt, Pike, Pope, Pulaski, Putnam, Randolph, Richland, Rock Island, St Clair, Saline, Sangamon, Schuyler, Scott, Shelby, Stephenson, Tazewell, Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Whiteside, Williamson, Winnebago

1865 includes 99 of the 102 counties at the time

Adams, Alexander, Bond, Boone, Brown, Bureau, Calhoun, Carroll, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Cook, Crawford, Cumberland, DeKalb, DeWitt, Douglas, DuPage, Edgar, Edwards, Effingham, Fayette, Ford, Franklin, Fulton, Greene, Grundy, Hamilton, Hancock, Hardin, Henderson, Henry, Iroquois, Jackson, Jasper, Jefferson, Jersey, Jo Daviess, Johnson, Kane, Kankakee, Kendall, Knox, Lake, LaSalle, Lawrence, Lee, Livingston, Logan, McDonough, McHenry, McLean, Macon, Macoupin, Madison, Marion, Marshall, Massac, Menard, Mercer, Montgomery, Morgan, Moultrie, Ogle, Peoria, Perry, Piatt, Pike, Pope, Pulaski, Putnam, Randolph, Richland, Rock Island, St Clair, Saline, Sangamon, Schuyler, Scott, Shelby, Stark, Stephenson, Tazewell (Elm Grove Twp only), Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Whiteside, Will, Williamson, Winnebago, Woodford