| 15th Avenue Post Office |
1490 Broadway, Gary, IN 46407 |
| Cedar Lake Post Office |
9715 W 133rd Ave, Cedar Lake, IN 46303 |
| Crown Point Post Office |
128 S East St, Crown Point, IN 46307 |
| Dyer Post Office |
2225 Great Lakes Dr, Dyer, IN 46311 |
| East Chicago Post Office |
901 E Chicago Ave, East Chicago, IN 46312 |
| Glen Park Post Office |
320 E 40th Ave, Gary, IN 46409 |
| Griffith Post Office |
900 N Broad St, Griffith, IN 46319 |
| Hammond Post Office |
5530 Sohl Ave, Hammond, IN 46320 |
| Harbor Post Office |
3813 Main St, East Chicago, IN 46312 |
| Hessville Post Office |
6530 Kennedy Ave, Hammond, IN 46323 |
| Hobart Post Office |
221 Main St, Hobart, IN 46342 |
| Leroy Post Office |
14120 Elkhart St, Leroy, IN 46355 |
| Lowell Post Office |
202 Washington St, Lowell, IN 46356 |
| Miller Post Office |
518 S Hancock St, Gary, IN 46403 |
| Saint John Post Office |
9200 Thiel St, Saint John, IN 46373 |
| Schererville Post Office |
1200 Eagle Ridge Dr, Schererville, IN 46375 |
| Schneider Post Office |
23914 Parrish Ave, Schneider, IN 46376 |
| Shelby Post Office |
23323 Shelby Rd, Shelby, IN 46377 |
| Tolleston Post Office |
2407 W 11th Ave, Gary, IN 46404 |
| Whiting Post Office |
1501 119th St, Whiting, IN 46394 |
| Gary Post Office |
1499 Martin Luther King Dr, Gary, IN 46401 |
| Highland Post Office |
8500 Kennedy Ave, Highland, IN 46322 |
| Lake Station Post Office |
2901 Central Ave, Lake Station, IN 46405 |
| Merrillville Post Office |
303 W 80th Pl, Merrillville, IN 46410 |
| Munster Post Office |
915 Ridge Rd Bldg 2, Munster, IN 46321 |
| South Calumet Avenue Post Office |
7142 Calumet Ave, Hammond, IN 46324 |
| Crown Point Annex Post Office |
1280 E Summit St, Crown Point, IN 46307 |
| Munster Post Office |
917 Ridge Rd, Munster, IN 46321 |
