Post Offices List in Johnson County, Illinois:
| Buncombe Post Office | 55 Main St, Buncombe, IL 62912 |
| Cypress Post Office | 7824 Main St, Cypress, IL 62923 |
| Goreville Post Office | 117 S Broadway, Goreville, IL 62939 |
| New Burnside Post Office | 20 W 2nd St, New Burnside, IL 62967 |
| Ozark Post Office | 495 Ozark Rd, Ozark, IL 62972 |
| Simpson Post Office | 329 Main St, Simpson, IL 62985 |
| Vienna Post Office | 207 E Vine St, Vienna, IL 62995 |