- Location: Oregon County, Missouri
- Legal status: Fourth-class city
- Population: 668 (Change since 1990: -3.5%)
- Founded: 1859
- Name origin: Alton, Illinois
- Located near intersection US 160 and MO 19 in the center
of the county
- Latitude: 36°41'39" N (+36.6942)
- Longitude: 91°23'57" W (-91.3992)
- Elevation: 779 feet above sea level
- Civil township: Piney
- Land area: 0.84 square miles (536.3 acres)
As the crow flies, Alton is...
Name origin
Probably named for Alton, Illinois
| Year | Population | Percent change |
|---|
| 1900 | 468 | -- |
| 1910 | 484 | +3.4% |
| 1930 | 439 | -9.3% |
| 1940 | 576 | +31.2% |
| 1950 | 571 | -0.9% |
| 1960 | 677 | +18.6% |
| 1970 | 715 | +5.6% |
| 1980 | 721 | +0.8% |
| 1990 | 692 | -4.0% |
| 2000 | 668 | -3.5% |