| County : | Jefferson County |
| State : | Kansas (KS) |
| Land Area : | 532.57 sq mi |
| Water Area : | 24.10 sq mi |
| Latitude : | 39.2396440 |
| Longitude : | -95.3753140 |
| Population (2010): | 19,126 |
| Population Estimate (2012) : | 19,036 |
| Population Density : | 35.91/sq mi |
| Housing Units (2012) : | 8,160 |
| Median Household Income (2012) : | $58,434 (Kansas : $51,273, USA : $53,046) |
| Median Family Income (2012) : | $66,556 (Kansas : $64,731, USA : $64,585) |
| Median House Price (2012) : | $131,700 (Kansas : $127,400, USA : $181,400) |
Jefferson County Cities / Towns
| Grantville (180) | Mclouth City (880) | Meriden City (813) |
| Nortonville City (637) | Oskaloosa City (1,113) | Ozawkie City (645) |
| Perry City (929) | Valley Falls City (1,192) | Winchester City (551) |
Jefferson County Zip Codes
| 66002 (13,755) | 66044 (28,417) | 66054 (2,860) |
| 66060 (1,122) | 66066 (2,636) | 66070 (2,661) |
| 66073 (2,537) | 66086 (9,759) | 66088 (2,457) |
| 66097 (1,071) | 66419 (442) | 66429 (579) |
| 66436 (5,879) | 66512 (3,361) | 66617 (8,688) |