| County : | Union County |
| State : | Ohio (OH) |
| Land Area : | 431.73 sq mi |
| Water Area : | 5.14 sq mi |
| Latitude : | 40.2959008 |
| Longitude : | -83.3670416 |
| Population (2010): | 52,300 |
| Population Estimate (2012) : | 52,153 |
| Population Density : | 121.14/sq mi |
| Housing Units (2012) : | 19,429 |
| Median Household Income (2012) : | $65,866 (Ohio : $48,246, USA : $53,046) |
| Median Family Income (2012) : | $77,618 (Ohio : $61,163, USA : $64,585) |
| Median House Price (2012) : | $172,800 (Ohio : $133,700, USA : $181,400) |
Union County Cities / Towns
| Dublin City (41,751) | Magnetic Springs Village (268) | Marysville City (22,094) |
| Milford Center Village (792) | New California (1,411) | Plain City Village (4,225) |
| Raymond (257) | Richwood Village (2,229) | Unionville Center Village (233) |
Union County Zip Codes
| 43015 (48,107) | 43016 (31,306) | 43017 (37,626) |
| 43029 (664) | 43036 (258) | 43040 (31,790) |
| 43045 (1,953) | 43060 (2,480) | 43061 (3,967) |
| 43064 (12,580) | 43067 (1,591) | 43077 (258) |
| 43084 (841) | 43302 (54,790) | 43319 (1,040) |
| 43340 (1,721) | 43342 (3,228) | 43344 (5,677) |
| 43358 (2,521) |