Founded in 1821, Sangamon County is one of 102 counties in the state of Illinois. Historically, Sangamon County was formed from Madison and Bond County. The city of Springfield is the county seat. With FIPS code of 167, Sangamon County has a population of 194,734 and area of 868 square miles (2,248 km2).
List of all cities in Sangamon County, IL alphabetically
| City/Town | Postal Code | Area Code |
| Ameritech, IL | 62721 | 217 |
| Andrew, IL | 62707 | 217 |
| Archer, IL | 62707 | 217 |
| Auburn, IL | 62615 | 217 |
| Barclay, IL | 62684 | 217 |
| Bates, IL | 62670 | 217 |
| Berlin, IL | 62670 | 217 |
| Berry, IL | 62563 | 217 |
| Bissell, IL | 62707 | 217 |
| Bolivia, IL | 62545 | 217 |
| Bradfordton, IL | 62707 | 217 |
| Breckenridge, IL | 62563 | 217 |
| Buckhart, IL | 62563 | 217 |
| Buffalo, IL | 62515 | 217 |
| Buffalo Hart, IL | 62515 | 217 |
| C I P S, IL | 62739 | 217 |
| Cantrall, IL | 62625 | 217 |
| Chatham, IL | 62629 | 217 |
| Cimic, IL | 62530 | 217 |
| Curran, IL | 62670 | 217 |
| Dawson, IL | 62520 | 217 |
| Dept of Transportation, IL | 62764 | 217 |
| Dept Public Property Cwlp, IL | 62757 | 217 |
| Devereux Heights, IL | 62707 | 217 |
| DHS Dept of Mental Health, IL | 62765 | 217 |
| Divernon, IL | 62530 | 217 |
| Drivers Lic Div, IL | 62723 | 217 |
| Farmingdale, IL | 62677 | 217 |
| Glenarm, IL | 62536 | 217 |
| Grandview, IL | 62702 | 217 |
| Healthcare and Family Serv, IL | 62763 | 217 |
| Hope School, IL | 62716 | 217 |
| Horace Mann Ins, IL | 62715 | 217 |
| Hwy Accident Bureau, IL | 62766 | 217 |
| Il Dept Reg and Educ, IL | 62786 | 217 |
| Ill Dept Human Services, IL | 62762 | 217 |
| Ill Dept Ins, IL | 62767 | 217 |
| Ill Dept Public Health, IL | 62761 | 217 |
| Ill Dept Revenue, IL | 62776 | 217 |
| Ill Office Educ, IL | 62777 | 217 |
| Ill R O Tax Div, IL | 62796 | 217 |
| Ill Secy State, IL | 62756 | 217 |
| Illiopolis, IL | 62539 | 217 |
| Jerome, IL | 62704 | 217 |
| Lanesville, IL | 62515 | 217 |
| Leland Grove, IL | 62704 | 217 |
| Loami, IL | 62661 | 217 |
| Lowder, IL | 62662 | 217 |
| Mechanicsburg, IL | 62545 | 217 |
| Memorial Med Center, IL | 62781 | 217 |
| New Berlin, IL | 62670 | 217 |
| New City, IL | 62563 | 217 |
| Old Berlin, IL | 62670 | 217 |
| Pawnee, IL | 62558 | 217 |
| Pleasant Plns, IL | 62677 | 217 |
| Richland, IL | 62677 | 217 |
| Riddle Hill, IL | 62707 | 217 |
| Riverton, IL | 62561 | 217 |
| Roby, IL | 62545 | 217 |
| Rochester, IL | 62563 | 217 |
| Saint Johns Hospital, IL | 62769 | 217 |
| Salisbury, IL | 62677 | 217 |
| Secy of State Vehicle Svcs, IL | 62722 | 217 |
| Sherman, IL | 62684 | 217 |
| Sicily, IL | 62558 | 217 |
| Southern View, IL | 62703 | 217 |
| Spaulding, IL | 62561 | 217 |
| Springfield, IL | 62701 | 217 |
| 62702 | 217 | |
| 62703 | 217 | |
| 62704 | 217 | |
| 62705 | 217 | |
| 62706 | 217 | |
| 62707 | 217 | |
| 62708 | 217 | |
| 62711 | 217 | |
| 62712 | 217 | |
| 62715 | 217 | |
| 62716 | 217 | |
| 62719 | 217 | |
| 62721 | 217 | |
| 62722 | 217 | |
| 62723 | 217 | |
| 62726 | 217 | |
| 62736 | 217 | |
| 62739 | 217 | |
| 62746 | 217 | |
| 62756 | 217 | |
| 62757 | 217 | |
| 62761 | 217 | |
| 62762 | 217 | |
| 62763 | 217 | |
| 62764 | 217 | |
| 62765 | 217 | |
| 62766 | 217 | |
| 62767 | 217 | |
| 62769 | 217 | |
| 62776 | 217 | |
| 62777 | 217 | |
| 62781 | 217 | |
| 62786 | 217 | |
| 62791 | 217 | |
| 62794 | 217 | |
| 62796 | 217 | |
| State of Illinois, IL | 62706 | 217 |
| State Rev 3386, IL | 62726 | 217 |
| State Rev 3667, IL | 62736 | 217 |
| State Rev 3707, IL | 62746 | 217 |
| State Rev Box 3547, IL | 62719 | 217 |
| Thayer, IL | 62689 | 217 |
| Williamsville, IL | 62693 | 217 |