- Latitude: 38°37'06" N (+38.6183)
- Longitude: 90°35'21" W (-90.5892)
- Land area: 2.7 square miles
- Water area: 0.05 square miles (33.5 acres)
As the crow flies, Clarkson Valley is...
| Year | Population | Percent change |
|---|
| 1960 | 137 | -- |
| 1970 | 157 | +14.6% |
| 1980 | 1,435 | +814.0% |
| 1990 | 2,508 | +74.8% |
| 2000 | 2,675 | +6.7% |