Illinois Census online research should begin with what is available online for free. If this proves fruitful then congratulations! If not, then I would suggest signing up for the online census images (links to the right) where you can access all the available online Illinois census information directly from your computer at home.
- Illinois 1850 Census Records
- Illinois 1860 Census Records
- Illinois 1870 Census Records
- Illinois 1880 – 1890 Census Records
- Illinois 1900 -1930 Census Records
1850 Illinois Census
- Adams County 1850 Federal Census hosted by USGenWeb Census Project
- Brown County 1850 Federal Census hosted by USGenWeb Census Project
- Champaign County 1850 Federal Census hosted by USGenWeb Census Project
- Clark County 1850 Federal Census hosted by USGenWeb Census Project
- Crawford, IL 1850 Federal Census hosted by USGenWeb Census Project
- Gallatin County 1850 Federal Census hosted by USGenWeb Census Project
- Green County 1850 Federal Census hosted by USGenWeb Census Project
- Between Macoupin and Apple Creek
- South of Macoupin Creek
- South of Macoupin Creek & North of Apple Creek
- North of Apple Creek
- North of Apple Creek and Whitehall
- Grundy County 1850 Federal Census hosted by USGenWeb Census Project
- Hamilton County 1850 Federal Census hosted by USGenWeb Census Project
- Jefferson County 1850 Federal Census Images, hosted by USGenWeb Census Project
- McDonough County1850 Federal Census hosted by USGenWeb Census Project
- Macoupin County 1850 Federal Census hosted by USGenWeb Census Project
- Morgan County 1850 Federal Census hosted by USGenWeb Census Project
- Peoria County 1850 Federal Census hosted by USGenWeb Census Project
- Perry County 1850 Federal Census hosted by USGenWeb Census Project
- Saline County 1850 Federal Census hosted by USGenWeb Census Project
- Sangamon County 1850 Federal Census hosted by USGenWeb Census Project
- Index A-B
- Index B-C
- Index C-D
- Index D-E
- Index E-G
- Index G-H
- Index H-K
- Index K-M
- Index M
- Index M-P
- Index P-S
- Index S-T
- Index T-W
- Index W-Z
- Springfield 1
- Springfield 2
- Springfield 3
- Springfield 4
- Springfield 5
- Part 1
- Part 2
- Part 3
- Part 4
- Part 5
- Part 6
- Part 7
- Part 8
- Part 9
- Part 10
- Part 11
- Part 12
- Part 13
- Part 14
- Schuyler County 1850 Federal Census hosted by USGenWeb Census Project
- Scot County 1850 Federal Census hosted by USGenWeb Census Project
- Stark County 1850 Federal Census hosted by USGenWeb Census Project
- Tazewell County 1850 Federal Census hosted by USGenWeb Census Project
- Union County 1850 Federal Census hosted by USGenWeb Census Project
- Washington County 1850 Federal Census hosted by USGenWeb Census Project
- Wayne County 1850 Federal Census hosted by USGenWeb Census Project
- Will County 1850 Federal Census hosted by USGenWeb Census Project
- Index
- Lockport Twp.
- Joliet Twp.
- Plainfield Twp.
- Reed Twp.
- Wheatland
- DuPage
- Homer Twp.
- Trenton Twp.
- Rockville Twp.
- New Lenox Twp.
- Wilton Twp.
- Momence Twp.
- Channahon Twp.
- Wilmington Twp.
- Frankfort Twp.
- Troy Twp.
- Part 1
- Part 2
- Burbonnais Twp.
- Crete Twp.
- Carey Twp.
- Sherburne Twp.
- Joliet Twp.
- Jackson Twp.
- Townships
- See Census Images Online for ALL Counties!