| County : | Madison County |
| State : | Illinois (IL) |
| Land Area : | 715.58 sq mi |
| Water Area : | 24.98 sq mi |
| Latitude : | 38.8270818 |
| Longitude : | -89.9001954 |
| Population (2010): | 269,282 |
| Population Estimate (2012) : | 268,586 |
| Population Density : | 376.31/sq mi |
| Housing Units (2012) : | 117,106 |
| Median Household Income (2012) : | $52,756 (Illinois : $56,853, USA : $53,046) |
| Median Family Income (2012) : | $66,676 (Illinois : $70,144, USA : $64,585) |
| Median House Price (2012) : | $124,900 (Illinois : $190,800, USA : $181,400) |
Madison County Cities / Towns
| Alhambra Village (681) | Alton City (27,865) | Bethalto Village (9,521) |
| Collinsville City (25,579) | East Alton Village (6,301) | Edwardsville City (24,293) |
| Fairmont City Village (2,635) | Glen Carbon Village (12,934) | Godfrey Village (17,982) |
| Granite City (29,849) | Grantfork Village (337) | Hamel Village (816) |
| Hartford Village (1,429) | Highland City (9,919) | Holiday Shores (2,882) |
| Livingston Village (858) | Madison City (3,891) | Marine Village (960) |
| Maryville Village (7,487) | Mitchell (1,356) | New Douglas Village (319) |
| Pierron Village (600) | Pontoon Beach Village (5,836) | Rosewood Heights (4,038) |
| Roxana Village (1,542) | St. Jacob Village (1,098) | South Roxana Village (2,053) |
| Troy City (9,888) | Venice City (1,890) | Williamson Village (230) |
| Wood River City (10,657) | Worden Village (1,044) |
Madison County Zip Codes
| 62001 (1,752) | 62002 (32,704) | 62010 (11,186) |
| 62012 (6,654) | 62018 (3,604) | 62021 (936) |
| 62024 (9,775) | 62025 (33,748) | 62034 (13,819) |
| 62035 (16,494) | 62040 (43,735) | 62046 (713) |
| 62048 (1,459) | 62058 (843) | 62060 (4,847) |
| 62061 (1,718) | 62062 (7,658) | 62067 (2,401) |
| 62074 (1,087) | 62084 (1,606) | 62087 (2,087) |
| 62088 (6,960) | 62090 (1,189) | 62095 (11,237) |
| 62097 (2,828) | 62201 (7,547) | 62234 (33,430) |
| 62249 (15,971) | 62275 (3,621) | 62281 (2,155) |
| 62293 (4,748) | 62294 (14,367) |