| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Old Ubaka | city | Kebbi | Nigeria | 10.54 | 4.76 | 830 | 5364 |
| Old Umbum | city | South Australia | Australia | -28.47 | 136.40 | 324 | 0 |
| Old Umbum Homestead | city | South Australia | Australia | -28.47 | 136.40 | 324 | 0 |
| Old Umbum Station | city | South Australia | Australia | -28.47 | 136.40 | 324 | 0 |
| Old Union | city | Arkansas | United States | 33.23 | -92.54 | 147 | |
| Old Union | city | Mississippi | United States | 34.15 | -88.74 | 255 | |
| Old Union | city | Texas | United States | 32.93 | -97.13 | 830 | |
| Old Union | city | Texas | United States | 33.19 | -94.91 | 396 | |
| Old Union | city | Texas | United States | 31.41 | -96.42 | 830 | |
| Old Union | city | Texas | United States | 33.34 | -94.47 | 314 | |
| Old Union (historical) | city | Arkansas | United States | 34.34 | -94.10 | 974 | |
| Old Union (historical) | city | Arkansas | United States | 33.72 | -91.70 | 187 | |
| Old Union (historical) | city | Kentucky | United States | 36.85 | -86.44 | 830 | |
| Old Uppsala | city | Uppsala | Sweden | 59.90 | 17.63 | 68 | 20264 |
| Old Uryup | city | Kemerovskaya Oblast' | Russia | 55.83 | 89.33 | 830 | 691 |
| Old Ushtulia | city | Azarbayjan-e Sharqi | Iran | 38.02 | 46.98 | 5328 | 1985 |