| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 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 |