| City : | Fairfield City |
| County : | Brunswick County, Navarro County, Wayne County |
| State : | Illinois (IL) |
| | |
| Land Area : | 4.02 sq mi |
| Water Area : | 0.03 sq mi |
| Latitude : | 38.3791919 |
| Longitude : | -88.3715013 |
| | |
| Population (2010): | 5,154 |
| Population Estimate (2012) : | 5,285 |
| Population Density : | 1,283.24/sq mi |
| Housing Units (2012) : | 2,702 |
| Median Household Income (2012) : | $31,006 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $41,646 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $62,900 (Illinois : $190,800, USA : $181,400) |