| County : | Phelps County |
| State : | Missouri (MO) |
| Land Area : | 671.78 sq mi |
| Water Area : | 2.54 sq mi |
| Latitude : | 37.8663263 |
| Longitude : | -91.7903492 |
| Population (2010): | 45,156 |
| Population Estimate (2012) : | 44,825 |
| Population Density : | 67.22/sq mi |
| Housing Units (2012) : | 19,533 |
| Median Household Income (2012) : | $41,388 (Missouri : $47,333, USA : $53,046) |
| Median Family Income (2012) : | $53,130 (Missouri : $59,395, USA : $64,585) |
| Median House Price (2012) : | $110,400 (Missouri : $138,400, USA : $181,400) |
Phelps County Cities / Towns
| Doolittle City (630) | Edgar Springs City (208) | Newburg City (470) |
| Rolla City (19,559) | St. James City (4,216) |
Phelps County Zip Codes
| 65401 (32,383) | 65436 (91) | 65449 (351) |
| 65459 (8,233) | 65461 (105) | 65462 (1,593) |
| 65529 (232) | 65550 (3,127) | 65559 (9,385) |
| 65560 (14,392) |