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Genealogy Atlas has images of old American atlases during the years 1795, 1814, 1822, 1823, 1836, 1838, 1845, 1856, 1866, 1879 and 1897 for Illinois and other states.
You can view rotating animated maps for Illinois showing all the county boundaries for each census year overlayed with past and present maps so you can see the changes in county boundaries. You can view a list of maps for other states at Census Maps
You can view rotating animated maps for Illinois showing all the county boundary changes for each year overlayed with past and present maps so you can see the changes in county boundaries . You can view a list of maps for other states and State Department of Transportation Maps at County Maps.
Federal Population Schedules that exist for Illinois are 1820, 1830, 1840, 1850, 1860, 1870, 1880, 1890 (fragment, see below), 1900, 1910, 1920 and 1930. Edgar County lists county of births on the 1850 census. In addition to the three-volume 1860 AIS index, a card index for Cook County developed by Bernice C. Richard is at the Illinois State Archives with microfilm copies at Newberry Library and National Archives/Great Lakes Region. Over 1,000 cards in the O section for the Soundex for the 1880 federal population schedules were omitted. All of the aforementioned are at the Illinois State Historical Library.Only Mound Township of McDonough County survives from the 1890 census.
There are Industry and Agriculture Schedules availible for the years 1850, 1860, 1870 and 1880. Slave Schedules exist for 1850 & 1860. The Mortality Schedules for the years 1850, 1860, 1870 and 1880. Union Veterans Schedules were conducted in 1890.
Territorial Schedules: Two territorial censuses were taken for Illinois populace in 1810 (as Indiana Territory) and 1818 (as Illinois Territory). The 1810 extant returns only include Randolph County in the southern portion of the state. What remains of both censuses have been indexed by AISI. Originals are at the Illinois state archives.
State Schedules: The state censuses will list only the head of family by name, followed by numerical totals in age categories for the balance of the household. The following enumerations were taken by the state and remain extant.
- 1820—Eighteen counties which included all of Illinois except Edwards County
- 1825—Edwards, Fulton, and Randolph counties only
- 1830—Morgan County only (includes present counties of Cass, Morgan, and Scott)
- 1835—Fayette, Fulton, Jasper, and Morgan counties (includes present counties of Cass, Morgan, and Scott)
- 1840—Thirty-five counties included. Consult Descriptive Inventory of the Archives of the State of Illinois (see Archives, Libraries, and Societies) for list of counties.
- 1845—Cass, Madison, Putnam, and Tazewell counties only
- 1855—For all counties except Carroll, Champaign, Franklin, Gallatin, Henry, Jefferson, Lake, Stark, Will, and Woodford
- 1865—For all counties except Gallatin, Mason, Monroe, and Tazewell (Elm Township in Tazewell County has survived)
Some city census enumerations were made in Illinois in the 1930s. There is also a microfilmed military census, enumerated in 1862, by county, which lists men eighteen to forty-five years of age. It can be borrowed on interlibrary loan from the Illinois State Archives.
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