| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Old Madison | city | South Carolina | United States | 34.61 | -83.20 | 830 | |
| Old Mammoth | city | California | United States | 37.63 | -118.98 | 8389 | |
| Old Manor | city | Virginia | United States | 37.33 | -79.94 | 1023 | |
| Old Marco Junction | city | Florida | United States | 26.02 | -81.70 | 3 | |
| Old Marissa | city | Illinois | United States | 38.26 | -89.75 | 830 | |
| Old Martin Mill Place | city | Arkansas | United States | 35.94 | -91.20 | 226 | |
| Old Mastic | city | New York | United States | 40.78 | -72.82 | 3 | |
| Old Mayfield (historical) | city | Kentucky | United States | 36.89 | -88.92 | 830 | |
| Old Maylene | city | Alabama | United States | 33.19 | -86.86 | 830 | |
| Old McGrath | city | Alaska | United States | 62.97 | -155.58 | 331 | |
| Old McKeal Place | city | Wyoming | United States | 41.59 | -106.96 | 6797 | |
| Old Merritt | city | Missouri | United States | 36.90 | -92.89 | 1145 | |
| Old Mesaba | city | Minnesota | United States | 47.58 | -92.13 | 1669 | |
| Old Middleton | city | Tennessee | United States | 36.18 | -85.99 | 830 | |
| Old Milan | city | Indiana | United States | 39.15 | -85.13 | 997 | |
| Old Mill | city | North Carolina | United States | 35.91 | -80.34 | 830 | |
| Old Mill | city | Virginia | United States | 37.39 | -79.50 | 830 | |
| Old Mill | city | Maryland | United States | 39.12 | -76.62 | 98 | |
| Old Mill Acres | city | Delaware | United States | 38.60 | -75.64 | 19 | |
| Old Mill Bottom Estates | city | Maryland | United States | 39.02 | -76.46 | 49 | |
| Old Mill Chase | city | Georgia | United States | 33.85 | -83.33 | 830 | |
| Old Mill Creek | city | Illinois | United States | 42.42 | -87.97 | 830 | |
| Old Mill Estates | city | South Carolina | United States | 34.93 | -82.31 | 872 | |
| Old Mill Estates | city | Virginia | United States | 38.98 | -77.30 | 298 | |
| Old Mill Farms | city | New Jersey | United States | 40.32 | -74.60 | 88 | |
| Old Mill Forest | city | Virginia | United States | 37.20 | -80.02 | 1223 | |
| Old Mill Gardens | city | Michigan | United States | 42.27 | -85.20 | 908 | |
| Old Mill Grove | city | Illinois | United States | 42.20 | -88.08 | 843 | |
| Old Mill Manor | city | Delaware | United States | 39.69 | -75.70 | 49 | |
| Old Mill Mobile Home Park | city | New York | United States | 43.22 | -78.48 | 830 | |
| Old Mill Park Mobile Home Park | city | California | United States | 36.99 | -121.96 | 68 | |
| Old Mill Pointe | city | Pennsylvania | United States | 39.88 | -75.42 | 98 | |
| Old Mill Subdivision Phase 1-3 | city | Utah | United States | 41.24 | -111.95 | 4396 | |
| Old Mill Trace | city | Alabama | United States | 33.20 | -87.44 | 295 | |
| Old Mill Trace | city | Georgia | United States | 34.94 | -85.18 | 830 | |
| Old Mill Village | city | West Virginia | United States | 37.77 | -81.22 | 2509 | |
| Old Millersburg (historical) | city | Tennessee | United States | 35.70 | -86.35 | 830 | |
| Old Milo | city | Arkansas | United States | 33.29 | -91.89 | 173 | |
| Old Milwaukee East Colonia | city | Texas | United States | 27.49 | -99.42 | 830 | |
| Old Milwaukee West Colonia | city | Texas | United States | 27.49 | -99.43 | 830 | |
| Old Mines | city | Missouri | United States | 38.02 | -90.76 | 830 | |
| Old Minto | city | Alaska | United States | 64.89 | -149.17 | 305 | |
| Old Mission | city | Michigan | United States | 44.96 | -85.49 | 830 | |
| Old Monroe | city | Missouri | United States | 38.93 | -90.75 | 830 | |
| Old Monrovia | city | Alabama | United States | 34.77 | -86.71 | 830 | |
| Old Montgomery (historical) | city | Louisiana | United States | 31.66 | -92.90 | 114 | |
| Old Morrisville | city | South Carolina | United States | 33.60 | -79.51 | 42 | |
| Old Moses | city | New Mexico | United States | 36.68 | -103.08 | 5029 | |
| Old Moulton | city | Texas | United States | 29.59 | -97.18 | 830 | |
| Old Mount Pleasant (historical) | city | Louisiana | United States | 32.15 | -92.19 | 154 | |
| Old Mount Vinco | city | Virginia | United States | 37.61 | -78.60 | 830 | |
| Old Mountain House | city | Pennsylvania | United States | 40.02 | -78.19 | 1669 | |
| Old Mountain View (historical) | city | Colorado | United States | 38.83 | -104.99 | 9583 | |
| Old Mouth North River | city | Massachusetts | United States | 42.13 | -70.68 | 3 | |
| Old Myakka | city | Florida | United States | 27.31 | -82.27 | 32 | |
| Old Myndus | city | Virginia | United States | 37.82 | -78.85 | 830 | |
| Old Myrtle | city | Mississippi | United States | 34.53 | -89.12 | 377 | |
| Old Mystic | city | Connecticut | United States | 41.39 | -71.96 | 134 |