| County : | Clark County |
| State : | Ohio (OH) |
| Land Area : | 397.47 sq mi |
| Water Area : | 5.05 sq mi |
| Latitude : | 39.9170315 |
| Longitude : | -83.7836760 |
| Population (2010): | 138,333 |
| Population Estimate (2012) : | 138,278 |
| Population Density : | 348.03/sq mi |
| Housing Units (2012) : | 61,419 |
| Median Household Income (2012) : | $43,684 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $54,153 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $108,100 (Ohio : $133,700, USA : $181,400) |
Clark County Cities / Towns
| Catawba Village (272) | Clifton Village (152) | Crystal Lakes (1,483) |
| Donnelsville Village (304) | Enon Village (2,415) | Green Meadows (2,327) |
| Holiday Valley (1,510) | New Carlisle City (5,785) | North Hampton Village (478) |
| Northridge (7,572) | Park Layne (4,343) | South Charleston Village (1,693) |
| South Vienna Village (384) | Springfield City (60,608) | Tremont City Village (375) |
Clark County Zip Codes
| 43010 (272) | 43044 (5,528) | 43078 (20,885) |
| 43140 (24,066) | 43153 (971) | 45314 (5,916) |
| 45316 (115) | 45319 (293) | 45323 (5,019) |
| 45324 (40,529) | 45341 (3,883) | 45344 (16,955) |
| 45349 (427) | 45368 (4,727) | 45369 (3,545) |
| 45372 (375) | 45387 (5,169) | 45502 (16,110) |
| 45503 (32,999) | 45504 (18,465) | 45505 (20,197) |
| 45506 (14,055) |