| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Alt Oderberg | city | Moravskoslezsky Kraj | Czech Republic | 49.92 | 18.34 | 830 | 52829 |
| Alt Oer | city | Nordrhein-Westfalen | Germany | 51.64 | 7.23 | 278 | 76291 |
| Alt Olisch | city | Czech Republic | 50.80 | 14.33 | 830 | 4023 | |
| Alt Orab | city | Hardap | Namibia | -24.78 | 17.87 | 3497 | 149 |
| Alt Ostdorf | city | Opolskie | Poland | 50.68 | 18.19 | 830 | 11441 |