A region's economy thrives or dives because of the people who choose to live there. That choice may occur by being born there and desiring to stay, or a more deliberate one of choosing to relocate from somewhere else. Monitoring change in the size and movement of population is an important barometer of well-being.
| Population Over Time | |||||
| 1990 | 2000 | 2005 | 2010 | 2018 | |
| Total Population | 21,512 | 21,815 | 21,595 | 21,253 | 20,764 |
| Change Since 1990 | 303 | 83 | -259 | -748 | |
| Pct. Change Since 1990 | 1.4% | 0.4% | -1.2% | -3.5% | |
| Components of Population Change 2017 to 2018 | ||
| Number | ||
| Net Domestic Migration | -186 | |
| International Migration | 2 | |
| Natural Increase (births minus deaths) | 40 | |
| Births | 272 | |
| Deaths | 232 | |
| Population Estimates by Age in 2018 | ||
| Number | Pct. Dist | |
| Preschool (0 to 4) | 1,496 | 7.2% |
| School Age (5 to 17) | 3,807 | 18.3% |
| College Age (18 to 24) | 1,680 | 8.1% |
| Young Adult (25 to 44) | 4,557 | 21.9% |
| Older Adult (45 to 64) | 5,513 | 26.6% |
| Older (65 plus) | 3,711 | 17.9% |
| Population Estimates by Race and Hispanic Origin in 2018 | ||
| Number | Pct. Dist | |
| American Ind. or Alaskan Native Alone | 41 | 0.2% |
| Asian Alone | 88 | 0.4% |
| Black Alone | 105 | 0.5% |
| Native Hawaiian and Other Pac. Isl. Alone | 6 | 0.0% |
| White Alone | 20,294 | 97.7% |
| Two or More Race Groups | 230 | 1.1% |
| Hispanic or Latino | ||
| Non-Hispanic or Latino | 20,094 | 96.8% |
| Hispanic or Latino | 670 | 3.2% |
| Households in 2017 | ||
| Number | Pct. Dist | |
| Total Households | 8,195 | 100.0% |
| Family Households | 5,383 | 65.7% |
| Married with Children | 1,470 | 17.9% |
| Married without Children | 2,693 | 32.9% |
| Single Parents | 780 | 9.5% |
| Other | 440 | 5.4% |
| Non-family Households | 2,812 | 34.3% |
| Living Alone | 2,376 | 29.0% |
| Average Household Size | 2.55 | |
| Average Family Household Size | 3.88 | |
| Population Counts by Decade | |||
| Population | Numerical Chg. | Pct. Chg. | |
| 1950 | 23,157 | NA | NA |
| 1960 | 22,572 | -585 | -2.5% |
| 1970 | 23,575 | 1,003 | 4.4% |
| 1980 | 23,239 | -336 | -1.4% |
| 1990 | 21,512 | -1,727 | -7.4% |
| April 2000 | 21,815 | 303 | 1.4% |
| April 2010 | 21,253 | -562 | -2.6% |
| Population Projections | |||||
| 2010 | 2015 | 2020 | 2025 | 2030 | |
| Population Projections | 21,253 | 21,045 | 20,930 | 20,866 | 20,755 |
| Change Since 2010 | -208 | -323 | -387 | -498 | |
| Pct. Change Since 2010 | -1.0% | -1.5% | -1.8% | -2.3% | |