| Year | Population | Increase | Change % |
|---|---|---|---|
| 1880 | 1,356 | -- | -- |
| 1890 | 2,011 | 655 | 48.3 |
| 1900 | 3,053 | 1,042 | 51.8 |
| 1910 | 8,210 | 5,157 | 168.9 |
| 1920 | 8,755 | 545 | 6.6 |
| 1930 | 11,489 | 2,734 | 31.2 |
| 1940 | 12,251 | 762 | 6.6 |
| 1950 | 14,937 | 2,686 | 18 |
| 1960 | 25,027 | 10,090 | 40.3 |
| 1970 | 43,337 | 18,310 | 42.3 |
| 1980 | 65,092 | 21,755 | 33.4 |
| 1990 | 87,758 | 22,666 | 25.8 |
| 2000 | 118,652 | 30,894 | 26 |
| 2010 | 143,986 | 25,334 | 17.5 |
SOURCE: U.S. Bureau of the Census for indicated Census years.
| Year | Population | Increase | Change % |
|---|---|---|---|
| 1900 | 12,168 | -- | -- |
| 1910 | 25,270 | 13,102 | 61.8 |
| 1920 | 27,872 | 2,602 | 9.3 |
| 1930 | 33,137 | 5,265 | 15.9 |
| 1940 | 35,539 | 2,402 | 6.8 |
| 1950 | 43,554 | 8,015 | 18.4 |
| 1960 | 53,343 | 9,789 | 22.5 |
| 1970 | 89,900 | 36,557 | 40.6 |
| 1980 | 149,184 | 59,284 | 39.7 |
| 1990 | 186,136 | 36,952 | 19.8 |
| 2000 | 251,494 | 65,358 | 25.9 |
| 2010 | 299,630 | 48,136 | 16 |
SOURCES: Colorado State Planning Division, 1961; U.S. Bureau of the Census, 1970-2000.
Preserving the history of Fort Collins, Colorado & the Cache la Poudre region
