| Belleville Post Office |
120 W Washington St, Belleville, IL 62220 |
| Caseyville Post Office |
113 S Long St, Caseyville, IL 62232 |
| Dupo Post Office |
116 Emma Ave, Dupo, IL 62239 |
| Dutch Hollow Post Office |
5731 Mount Pleasant Ln, Belleville, IL 62223 |
| East Carondelet Post Office |
824 State St, East Carondelet, IL 62240 |
| East Saint Louis Post Office |
950 Missouri Ave, East Saint Louis, IL 62201 |
| Edgemont Post Office |
8701 State St, East Saint Louis, IL 62203 |
| Fairview Heights Post Office |
10850 Lincoln Trl Unit 20, Fairview Heights, IL 62208 |
| Freeburg Post Office |
3 S Belleville St, Freeburg, IL 62243 |
| Lebanon Post Office |
201 E Saint Louis St, Lebanon, IL 62254 |
| Lenzburg Post Office |
312 N Charles St, Lenzburg, IL 62255 |
| Lovejoy Post Office |
413 S 3rd St, Lovejoy, IL 62059 |
| Marissa Post Office |
114 N Main St, Marissa, IL 62257 |
| Mascoutah Post Office |
18 W Main St, Mascoutah, IL 62258 |
| Millstadt Post Office |
20 W White St, Millstadt, IL 62260 |
| National Stock Yards Post Office |
3900 Collinsville Rd, East Saint Louis, IL 62201 |
| New Athens Post Office |
200 S Benton St, New Athens, IL 62264 |
| O Fallon Post Office |
1111 S Lincoln Ave, O Fallon, IL 62269 |
| Saint Libory Post Office |
7340 State Route 15, Saint Libory, IL 62282 |
| Smithton Post Office |
512 S Main St, Smithton, IL 62285 |
| Summerfield Post Office |
101 E Park St, Summerfield, IL 62289 |
| Alorton Post Office |
4825 Bond Ave, East Saint Louis, IL 62207 |
| Cahokia Post Office |
801 Range Ln, East Saint Louis, IL 62206 |
| Scott Air Force Base Post Office |
404 W Martin St, Scott Air Force Base, IL 62225 |
