- Location: Phelps County, Missouri
- Legal status: Third-class city
- Population: 16,367 (Change since 1990: +16.2%)
- Latitude: 37°57'05" N (+37.9514)
- Longitude: 91°46'16" W (-91.7711)
- Land area: 11.3 square miles
- Water area: 0.01 square miles (5.2 acres)
As the crow flies, Rolla is...
| Year | Population | Percent change |
|---|
| 1900 | 1,600 | -- |
| 1910 | 2,261 | +41.3% |
| 1920 | 2,077 | -8.1% |
| 1930 | 3,670 | +76.7% |
| 1940 | 5,141 | +40.1% |
| 1950 | 9,354 | +81.9% |
| 1960 | 11,132 | +19.0% |
| 1970 | 13,571 | +21.9% |
| 1980 | 13,303 | -2.0% |
| 1990 | 14,090 | +5.9% |
| 2000 | 16,367 | +16.2% |