| County : | Gallia County |
| State : | Ohio (OH) |
| Land Area : | 466.53 sq mi |
| Water Area : | 4.67 sq mi |
| Latitude : | 38.8170456 |
| Longitude : | -82.3017463 |
| Population (2010): | 30,934 |
| Population Estimate (2012) : | 30,877 |
| Population Density : | 66.31/sq mi |
| Housing Units (2012) : | 13,925 |
| Median Household Income (2012) : | $39,399 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $49,848 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $99,300 (Ohio : $133,700, USA : $181,400) |
Gallia County Cities / Towns
| Centerville Village (103) | Cheshire Village (132) | Crown City Village (413) |
| Gallipolis Village (3,641) | Kanauga (175) | Rio Grande Village (830) |
| Vinton Village (222) |
Gallia County Zip Codes
| 45614 (5,080) | 45620 (917) | 45623 (3,494) |
| 45631 (15,048) | 45656 (6,639) | 45658 (2,787) |
| 45674 (584) | 45678 (1,101) | 45685 (1,251) |
| 45686 (3,397) | 45688 (475) |