Post Offices List in Springfield City, Illinois:
| Capitol Post Office | 401 S Spring St, Springfield, IL 62706 |
| Downtown Springfield Post Office | 411 E Monroe St, Springfield, IL 62701 |
| Northeast Annex Post Office | 1927 E Sangamon Ave, Springfield, IL 62702 |
| Springfield Post Office | 2105 E Cook St, Springfield, IL 62703 |
| Southwest Post Office | 1760 Wabash Ave, Springfield, IL 62704 |