| Name |
County |
| McHenry Post Office |
Stone County |
| McLain Post Office |
Greene County |
| McNeill Post Office |
Pearl River County |
| Meadville Post Office |
Franklin County |
| Mendenhall Post Office |
Simpson County |
| Meridian Post Office |
Lauderdale County |
| Merigold Post Office |
Bolivar County |
| Metcalfe Post Office |
Washington County |
| Michigan City Post Office |
Benton County |
| Minter City Post Office |
Leflore County |
| Mississippi State Post Office |
Oktibbeha County |
| Mize Post Office |
Smith County |
| Monticello Post Office |
Lawrence County |
| Mooreville Post Office |
Lee County |
| Moorhead Post Office |
Sunflower County |
| Morgan City Post Office |
Leflore County |
| Morton Post Office |
Scott County |
| Moselle Post Office |
Jones County |
| Moss Point Post Office |
Jackson County |
| Mound Bayou Post Office |
Bolivar County |
| Mount Olive Post Office |
Covington County |
| Myrtle Post Office |
Union County |
| Natchez Post Office |
Adams County |
| Naval Construction Battalion Center Post Office |
Harrison County |
| Neely Post Office |
Greene County |
| Nesbit Post Office |
DeSoto County |
| Nettleton Post Office |
Lee County |
| New Albany Post Office |
Union County |
| New Augusta Post Office |
Perry County |
| New Hebron Post Office |
Lawrence County |
| Newton Post Office |
Newton County |
| Nicholson Post Office |
Pearl River County |
| North Bay D'Iberville Post Office |
Harrison County |
| North Carrollton Post Office |
Carroll County |
| North Jackson Post Office |
Hinds County |
| North Meridian Post Office |
Lauderdale County |
| Noxapater Post Office |
Winston County |
| Oak Vale Post Office |
Lawrence County |
| Oakland Post Office |
Yalobusha County |
| Ocean Springs Post Office |
Jackson County |
| Okolona Post Office |
Chickasaw County |
| Olive Branch Post Office |
DeSoto County |
| Osyka Post Office |
Pike County |
| Ovett Post Office |
Jones County |
| Oxford Post Office |
Lafayette County |
| Pace Post Office |
Bolivar County |
| Pachuta Post Office |
Clarke County |
| Pascagoula Post Office |
Jackson County |
| Pass Christian Post Office |
Harrison County |
| Pattison Post Office |
Claiborne County |
| Paulding Post Office |
Jasper County |
| Pearl Post Office |
Rankin County |
| Pelahatchie Post Office |
Rankin County |
| Perkinston Post Office |
Stone County |
| Petal Post Office |
Forrest County |
| Pheba Post Office |
Clay County |
| Philadelphia Post Office |
Neshoba County |
| Philipp Post Office |
Tallahatchie County |
| Picayune Carrier Annex Post Office |
Pearl River County |
| Picayune Post Office |
Pearl River County |
| Pickens Post Office |
Holmes County |
| Piney Woods Post Office |
Rankin County |
| Pinola Post Office |
Simpson County |
| Pittsboro Post Office |
Calhoun County |
| Plantersville Post Office |
Lee County |
| Pontotoc Post Office |
Pontotoc County |
| Pope Post Office |
Panola County |
| Poplarville Post Office |
Pearl River County |
| Port Gibson Post Office |
Claiborne County |
| Porterville Post Office |
Kemper County |
| Potts Camp Post Office |
Marshall County |
| Prairie Post Office |
Monroe County |
| Prentiss Post Office |
Jefferson Davis County |
| Preston Post Office |
Kemper County |
| Puckett Post Office |
Rankin County |
