| County : | Jefferson County |
| State : | Iowa (IA) |
| Land Area : | 435.51 sq mi |
| Water Area : | 1.37 sq mi |
| Latitude : | 41.0068799 |
| Longitude : | -91.9671367 |
| Population (2010): | 16,843 |
| Population Estimate (2012) : | 16,791 |
| Population Density : | 38.67/sq mi |
| Housing Units (2012) : | 7,594 |
| Median Household Income (2012) : | $48,411 (Iowa : $51,129, USA : $53,046) |
| Median Family Income (2012) : | $58,971 (Iowa : $64,772, USA : $64,585) |
| Median House Price (2012) : | $90,100 (Iowa : $123,000, USA : $181,400) |
Jefferson County Cities / Towns
| Batavia City (499) | Coppock City (47) | Fairfield City (9,464) |
| Libertyville City (315) | Lockridge City (268) | Maharishi Vedic City (259) |
| Packwood City (204) | Pleasant Plain City (93) |
Jefferson County Zip Codes
| 52533 (1,215) | 52535 (888) | 52540 (1,420) |
| 52554 (1,373) | 52556 (13,247) | 52557 (85) |
| 52563 (1,583) | 52567 (615) | 52580 (460) |
| 52585 (988) | 52635 (675) | 52641 (12,357) |
| 52651 (646) |