| County : | Carroll County |
| State : | Illinois (IL) |
| Land Area : | 444.80 sq mi |
| Water Area : | 21.55 sq mi |
| Latitude : | 42.0590844 |
| Longitude : | -89.9264854 |
| Population (2010): | 15,387 |
| Population Estimate (2012) : | 15,338 |
| Population Density : | 34.59/sq mi |
| Housing Units (2012) : | 8,437 |
| Median Household Income (2012) : | $48,456 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $56,649 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $99,600 (Illinois : $190,800, USA : $181,400) |
Carroll County Cities / Towns
| Chadwick Village (551) | Lanark City (1,457) | Milledgeville Village (1,032) |
| Mount Carroll City (1,717) | Savanna City (3,062) | Shannon Village (757) |
| Thomson Village (590) |
Carroll County Zip Codes
| 61014 (1,173) | 61046 (2,831) | 61051 (1,574) |
| 61053 (2,852) | 61062 (1,983) | 61074 (4,431) |
| 61078 (1,374) | 61252 (5,436) | 61285 (1,631) |