Federal Population Schedules
- Indexed—1860 (as various territories, see below), 1870, 188, 1900, 1910, 1920, 1930, 1940.
- Soundex—1880, 1900, 1920 ((You can find definition of Soundex at FamilySearch.org wiki at https://www.familysearch.org/wiki/en/Soundex).
Industry and Agriculture Schedules
Territorial and State
- 1860 The first census in what would become Colorado was taken in 1860 as part of several territorial censuses. Arapahoe County, which covered the central eastern section, was included in the Kansas territorial census for that year. The area of Boulder City, Altoona City, Boulder Creek Settlement, Gold Hill Settlement, Miraville City, and the Platte River Settlement weere enumerated with Nebraska Territory, and are transcribed online by Ted and carol Miller at
https://sites.rootsweb.com/~usgenweb/ne/state/1860cens.htm#colorado60%3E. Denver City was enumerated partly with Nebraska and partly with the Kansas territorial census. The southeast port of Colorado wa enumerated in parts of Taos and Mora counties of New Mexico Territory. Leadville, although a booming mining town at the time and located in what is now Lake County, was in Utah Territory and not enumerated.1
- 1861 —Colorado Territory was organized in 1861, and voters residing in the territory were listed at that time. The original poll books only list males.
- 1866—An 1866 enumeration was taken, but the only extant returns are for the northeastern section which included the counties of Logan, Morgan, Phillips, Sedgwick, Weld, and parts of Washington and yuma. Heads of household with number of household members are included.
- 1885 A special Fedral census encompassing population, agricultural, manufacturing, and mortality returns is located at the Colorado State Archives, the national Archives—Rocky Mountain Region in Denver, Colorado Historical Cociety, the Denver Public Library and FHL. Most of the census is indexed at ancestry.com.1