| County : | Boone County |
| State : | Illinois (IL) |
| Land Area : | 280.72 sq mi |
| Water Area : | 1.31 sq mi |
| Latitude : | 42.3189831 |
| Longitude : | -88.8242951 |
| Population (2010): | 54,165 |
| Population Estimate (2012) : | 54,141 |
| Population Density : | 192.95/sq mi |
| Housing Units (2012) : | 19,970 |
| Median Household Income (2012) : | $63,670 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $69,423 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $164,700 (Illinois : $190,800, USA : $181,400) |
Boone County Cities / Towns
| Belvidere City (25,585) | Caledonia Village (197) | Capron Village (1,376) |
| Cherry Valley Village (3,162) | Garden Prairie Village (352) | Loves Park City (23,996) |
| Poplar Grove Village (5,023) | Timberlane Village (934) |
Boone County Zip Codes
| 60033 (13,922) | 60135 (7,248) | 60145 (2,627) |
| 60146 (2,713) | 61008 (34,311) | 61011 (2,945) |
| 61012 (2,175) | 61016 (4,837) | 61038 (1,354) |
| 61065 (11,156) | 61073 (20,052) | 61080 (10,599) |
| 61107 (30,439) | 61111 (23,492) | 61114 (15,776) |