Colorado Historical Society
1300 Broadway
Denver, CO 80203
303-866-3682
Website: www.coloradohistory.org/
Colorado State Archives
1313 Sherman, Room 1B20
Denver, CO 80203
303-866-2358
Website: www.colorado.gov/dpa/doit/archives/
Index to the 1870 Colorado census: www.colorado.gov/dpa/doit/archives/1870/index.htm
Fort Collins Public Library – Main Branch
201 Peterson Street
Fort Collins, Colorado 80524
970-221-6380
- State census (microfilm): 1885
- Federal census (microfilm): 1870-1910, Colorado only; 1920, Larimer County only
All Federal census are available through the library’s free Ancestry.com and HeritageQuest databases. A library card is required for access
Fort Collins Local History Archive
200 Mathews Street
Fort Collins, CO 80524
970-221-6688
Website: history.fcgov.com/
1885 State Census Index
The National Archives – Rocky Mountain Branch
Denver Federal Center, Building 46
Denver, Colorado
303-407-5751
Website: www.archives.gov/rocky-mountain/
All federal census records on microfilm.