| Year | Census | Index |
| 1870 | Film | Book, CD |
| 1870 African-American | CD | |
| 1880 | Film | CD, Book |
| 1900 | Film* | Partial; see below |
| 1920 | Ancestry.com | |
| 1930 | Ancestry.com | |
| 1930 | Denver street index on microfilm |
* Includes Mesa (part), Mineral, Montezuma, Montrose, Moran, Otero, Ouray, Park, Phillips (part)
The federally sponsored state census includes: street name and number, name of each person in family, color, race, sex, age, month of birth if born within the census year, relation of each person to head of family, whether single, married, widowed/divorced, married during census year, profession, number of months unemployed during census year, sickness or disability, blind, deaf and dumb, idiotic, insane, crippled, attended school with census year cannot read/write, place of birth (state or country), place of birth of mother and father.
Includes population, Agricultural, Manufacturing & Mortality schedules.
| Reel # 1 | Arapaho, Chinese in Denver |
| Reel # 2 | Archuleta, Bent, Boulder, Chaffee, Clear Creek |
| Reel # 3 | Conejos, Costilla, Custer, Delta, Dolores, Douglas, Eagle, Elbert |
| Reel # 4 | El Paso, Gilpin, Grand, Gunnison, Hinsdale, Huerfano |
| Reel # 5 | Jefferson, Lake, La Plata |
| Reel # 6 | Larimer, Las Animas, Mesa, Montrose, Ouray |
| Reel # 7 | Park, Pitkin, Peublo, Rio Grande, Routt |
| Reel # 8 | Saguache, San Juan, San Miguel, Summit, Weld |