| Historical population | |||
|---|---|---|---|
| Census | Pop. | %± | |
| 1830 | 517 | — | |
| 1840 | 688 | 33.1% | |
| 1850 | 2,645 | 284.4% | |
| 1860 | 2,913 | 10.1% | |
| 1870 | 5,657 | 94.2% | |
| 1880 | 10,940 | 93.4% | |
| 1890 | 18,786 | 71.7% | |
| 1900 | 18,006 | −4.2% | |
| 1910 | 21,563 | 19.8% | |
| 1920 | 19,550 | −9.3% | |
| 1930 | 13,624 | −30.3% | |
| 1940 | 14,078 | 3.3% | |
| 1950 | 29,957 | 112.8% | |
| 1960 | 47,921 | 60.0% | |
| 1970 | 52,586 | 9.7% | |
| 1980 | 63,188 | 20.2% | |
| 1990 | 78,024 | 23.5% | |
| 2000 | 79,589 | 2.0% | |
| 2010 | 73,090 | −8.2% | |
| Est. 2017 | 77,013 | [9] | 5.4% |