| County : | Williamson County |
| State : | Tennessee (TN) |
| Land Area : | 582.60 sq mi |
| Water Area : | 1.17 sq mi |
| Latitude : | 35.8949720 |
| Longitude : | -86.8969580 |
| Population (2010): | 183,182 |
| Population Estimate (2012) : | 184,225 |
| Population Density : | 314.42/sq mi |
| Housing Units (2012) : | 68,498 |
| Median Household Income (2012) : | $91,146 (Tennessee : $44,140, USA : $53,046) |
| Median Family Income (2012) : | $104,699 (Tennessee : $54,737, USA : $64,585) |
| Median House Price (2012) : | $337,000 (Tennessee : $138,700, USA : $181,400) |
Williamson County Cities / Towns
| Brentwood City (37,060) | Fairview City (7,720) | Franklin City (62,487) |
| Nolensville Town (5,861) | Spring Hill City (29,036) | Thompson's Station Town (2,194) |
Williamson County Zip Codes
| 37014 (1,855) | 37025 (6,226) | 37027 (49,035) |
| 37046 (3,665) | 37060 (2,230) | 37062 (10,745) |
| 37064 (48,118) | 37067 (23,652) | 37069 (18,899) |
| 37135 (9,681) | 37174 (26,418) | 37179 (11,767) |
| 37215 (21,190) | 37221 (36,610) | 38401 (54,469) |
| 38476 (1,228) |