Year Population

1850 1,848

1860 11,267

1870 20,038

1880 21,831

1890 26,872

1900 35,254

1910 43,028

1920 56,727

1930 60,751

1940 66,039

1950 74,549

1960 88,981

1970 98,469

1980 103,264

1990 95,333

2000 98,359

*2008 100,827

* - Estimate.

Sources: Census Bureau and Iowa State Data Center