| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Klein Oberwegergut | city | Oberosterreich | Austria | 47.88 | 14.60 | 1870 | 1937 |
| Klein Oedesse | city | Niedersachsen | Germany | 52.38 | 10.22 | 213 | 21386 |
| Klein Oels | city | Dolnoslaskie | Poland | 51.15 | 17.28 | 830 | 5295 |
| Klein Oesingen | city | Niedersachsen | Germany | 52.66 | 10.49 | 255 | 4470 |
| Klein Ofenberg | city | Niederosterreich | Austria | 47.90 | 14.82 | 1669 | 4465 |
| Klein Offenseth | city | Schleswig-Holstein | Germany | 53.80 | 9.69 | 19 | 27480 |
| Klein Offenseth-Sparrieshoop | city | Schleswig-Holstein | Germany | 53.80 | 9.70 | 16 | 27446 |
| Klein Okapuka | city | Khomas | Namibia | -22.30 | 17.06 | 5029 | 0 |
| Klein Olbersdorf | city | Moravskoslezsky Kraj | Czech Republic | 49.70 | 18.10 | 856 | 14399 |
| Klein Oletzko | city | Warminsko-Mazurskie | Poland | 53.97 | 22.54 | 830 | 3872 |
| Klein Olkowitz | city | Jihomoravsky Kraj | Czech Republic | 48.78 | 16.20 | 830 | 5860 |
| Klein Ollacker | city | Niedersachsen | Germany | 53.61 | 7.86 | 6 | 13408 |
| Klein Olschau | city | Warminsko-Mazurskie | Poland | 53.34 | 20.39 | 830 | 3685 |
| Klein Olversum | city | Schleswig-Holstein | Germany | 54.30 | 8.92 | 0 | 4966 |
| Klein Onganja | city | Khomas | Namibia | -22.12 | 17.48 | 6102 | 0 |
| Klein Onnaams | city | Hardap | Namibia | -22.95 | 17.28 | 5341 | 0 |
| Klein Oschersleben | city | Sachsen-Anhalt | Germany | 52.01 | 11.34 | 232 | 6040 |
| Klein Osingen | city | Niedersachsen | Germany | 52.66 | 10.49 | 255 | 4470 |
| Klein Ossnig | city | Brandenburg | Germany | 51.70 | 14.28 | 301 | 16297 |
| Klein Ostergroden | city | Niedersachsen | Germany | 53.67 | 7.87 | 9 | 2683 |
| Klein Ostiem | city | Niedersachsen | Germany | 53.53 | 7.96 | 3 | 27046 |
| Klein Otjikango Ost | city | Otjozondjupa | Namibia | -20.62 | 16.20 | 4337 | 149 |
| Klein Otschehau | city | Czech Republic | 50.19 | 13.48 | 1017 | 3512 | |
| Klein Ottenhagen | city | Kaliningradskaya Oblast' | Russia | 54.59 | 20.84 | 160 | 1636 |
| Klein Ottenhaus | city | Niedersachsen | Germany | 52.58 | 10.13 | 134 | 40685 |
| Klein Ottersleben | city | Sachsen-Anhalt | Germany | 52.09 | 11.57 | 242 | 73264 |
| Klein Ottlau | city | Pomorskie | Poland | 53.67 | 18.96 | 278 | 27322 |
| Klein Otze | city | Niedersachsen | Germany | 52.48 | 10.02 | 164 | 39967 |
| Klein Ouaggablatt | city | North West | South Africa | -27.50 | 24.20 | 5029 | 913 |
| Klein Overlaar | city | Wallonie | Belgium | 50.77 | 4.90 | 223 | 23254 |
| Klein Oßnig | city | Brandenburg | Germany | 51.70 | 14.28 | 301 | 16297 |
| Klein Oßnig - Wóseńck | city | Brandenburg | Germany | 51.70 | 14.28 | 301 | 16297 |