| County : | Seneca County |
| State : | Ohio (OH) |
| Land Area : | 551.01 sq mi |
| Water Area : | 1.78 sq mi |
| Latitude : | 41.1200082 |
| Longitude : | -83.1274357 |
| Population (2010): | 56,745 |
| Population Estimate (2012) : | 56,630 |
| Population Density : | 102.98/sq mi |
| Housing Units (2012) : | 24,122 |
| Median Household Income (2012) : | $42,375 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $52,347 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $100,000 (Ohio : $133,700, USA : $181,400) |
Seneca County Cities / Towns
| Attica Village (899) | Bascom (390) | Bettsville Village (661) |
| Bloomville Village (956) | Flat Rock (233) | Fort Seneca (254) |
| Fostoria City (13,441) | Green Springs Village (1,368) | Kansas (179) |
| Mccutchenville (400) | Melmore (153) | New Riegel Village (249) |
| Old Fort (186) | Republic Village (549) | Tiffin City (17,963) |
Seneca County Zip Codes
| 43316 (6,041) | 43410 (10,403) | 43457 (1,456) |
| 44802 (1,032) | 44807 (2,381) | 44809 (293) |
| 44811 (12,867) | 44815 (637) | 44818 (2,644) |
| 44828 (166) | 44830 (18,962) | 44836 (2,654) |
| 44841 (710) | 44844 (764) | 44853 (1,397) |
| 44861 (64) | 44867 (2,351) | 44882 (2,909) |
| 44883 (29,413) |