There are at least 18 cities named Union in the entire world. The following map and table contain general information about these cities.
| # | Country | Region | City | Coordinates |
|---|---|---|---|---|
| 1 | United States | Washington | Union | 47.355, -123.101 |
| 2 | United States | Oregon | Union | 45.208, -117.865 |
| 3 | Guatemala | Huehuetenango | Unión | 15.922, -91.776 |
| 4 | United States | Missouri | Union | 38.45, -91.008 |
| 5 | United States | Louisiana | Union | 30.087, -90.905 |
| 6 | United States | Mississippi | Union | 32.572, -89.121 |
| 7 | United States | Illinois | Union | 42.233, -88.542 |
| 8 | United States | Kentucky | Union | 38.946, -84.681 |
| 9 | United States | Ohio | Union | 39.898, -84.306 |
| 10 | United States | South Carolina | Union | 34.715, -81.624 |
| 11 | United States | West Virginia | Union | 37.592, -80.544 |
| 12 | United States | New Jersey | Union | 40.698, -74.263 |
| 13 | United States | Maine | Union | 44.211, -69.274 |
| 14 | Argentina | San Luis | Unión | -35.153, -65.946 |
| 15 | Paraguay | San Pedro | Unión | -24.808, -56.521 |
| 16 | Philippines | Western Visayas | Union | 11.761, 121.896 |
| 17 | Philippines | Central Visayas | Union | 10.67, 124.325 |
| 18 | Philippines | Caraga | Union | 9.757, 126.11 |
