| County : | Clay County |
| State : | Illinois (IL) |
| Land Area : | 468.31 sq mi |
| Water Area : | 1.28 sq mi |
| Latitude : | 38.7473124 |
| Longitude : | -88.4837894 |
| Population (2010): | 13,815 |
| Population Estimate (2012) : | 13,828 |
| Population Density : | 29.50/sq mi |
| Housing Units (2012) : | 6,404 |
| Median Household Income (2012) : | $39,966 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $50,620 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $75,500 (Illinois : $190,800, USA : $181,400) |
Clay County Cities / Towns
| Clay City Village (959) | Flora City (5,070) | Iola Village (141) |
| Louisville Village (1,139) | Sailor Springs Village (95) | Xenia Village (391) |
Clay County Zip Codes
| 62426 (1,085) | 62434 (330) | 62443 (1,623) |
| 62448 (5,834) | 62824 (1,761) | 62838 (1,497) |
| 62839 (6,718) | 62854 (1,776) | 62858 (2,981) |
| 62868 (1,872) | 62879 (85) | 62899 (1,612) |