| City : | Marietta City |
| County : | Harrison County, Menard County, Washington County |
| State : | Ohio (OH) |
| | |
| Land Area : | 8.43 sq mi |
| Water Area : | 0.32 sq mi |
| Latitude : | 39.4290660 |
| Longitude : | -81.4486125 |
| | |
| Population (2010): | 14,085 |
| Population Estimate (2012) : | 14,102 |
| Population Density : | 1,670.25/sq mi |
| Housing Units (2012) : | 6,519 |
| Median Household Income (2012) : | $32,685 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $46,500 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $101,900 (Ohio : $133,700, USA : $181,400) |