| County : | Union County |
| State : | Tennessee (TN) |
| Land Area : | 223.55 sq mi |
| Water Area : | 23.59 sq mi |
| Latitude : | 36.2841401 |
| Longitude : | -83.8360878 |
| Population (2010): | 19,109 |
| Population Estimate (2012) : | 19,179 |
| Population Density : | 85.48/sq mi |
| Housing Units (2012) : | 8,958 |
| Median Household Income (2012) : | $33,456 (Tennessee : $44,140, USA : $53,046) |
| Median Family Income (2012) : | $41,065 (Tennessee : $54,737, USA : $64,585) |
| Median House Price (2012) : | $97,300 (Tennessee : $138,700, USA : $181,400) |
Union County Cities / Towns
| Luttrell Town (1,074) | Maynardville City (2,413) | Plainview City (2,125) |
Union County Zip Codes
| 37705 (4,559) | 37721 (12,733) | 37754 (4,729) |
| 37779 (3,978) | 37807 (9,923) | 37825 (8,399) |
| 37848 (246) | 37866 (1,699) | 37870 (4,580) |
| 37888 (2,741) |