| County : | Knox County |
| State : | Illinois (IL) |
| Land Area : | 716.39 sq mi |
| Water Area : | 3.42 sq mi |
| Latitude : | 40.9309412 |
| Longitude : | -90.2137611 |
| Population (2010): | 52,919 |
| Population Estimate (2012) : | 52,698 |
| Population Density : | 73.87/sq mi |
| Housing Units (2012) : | 24,077 |
| Median Household Income (2012) : | $40,419 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $52,556 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $80,400 (Illinois : $190,800, USA : $181,400) |
Knox County Cities / Towns
| Abingdon City (3,319) | Altona Village (531) | East Galesburg Village (812) |
| Galesburg City (32,195) | Gilson (190) | Henderson Village (255) |
| Knoxville City (2,911) | London Mills Village (392) | Maquon Village (284) |
| Oak Run (547) | Oneida City (700) | Rio Village (220) |
| St. Augustine Village (120) | Victoria Village (316) | Wataga Village (843) |
| Williamsfield Village (578) | Yates City Village (693) |
Knox County Zip Codes
| 61401 (34,788) | 61410 (3,912) | 61414 (854) |
| 61428 (986) | 61430 (828) | 61434 (3,312) |
| 61436 (951) | 61439 (269) | 61448 (3,823) |
| 61449 (512) | 61458 (822) | 61467 (1,048) |
| 61472 (648) | 61474 (292) | 61485 (560) |
| 61488 (1,120) | 61489 (900) | 61490 (1,091) |
| 61529 (2,880) | 61531 (3,379) | 61544 (713) |
| 61572 (1,068) |