| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oagaer | city | Denmark | 55.10 | 11.88 | 65 | 2336 | |
| Oager | city | Denmark | 55.10 | 11.88 | 65 | 2336 | |
| Oager Huse | city | Denmark | 55.10 | 11.88 | 65 | 2336 | |
| Oen-Skovhuse | city | Denmark | 55.12 | 12.10 | 16 | 3297 | |
| Oen-Smidstrup | city | Denmark | 55.10 | 12.12 | 16 | 2894 | |
| Ollebolle | city | Denmark | 54.68 | 11.60 | 22 | 1553 | |
| Ollerup | city | Denmark | 55.27 | 11.68 | 65 | 8793 | |
| Olstrup | city | Denmark | 54.77 | 11.60 | 45 | 4798 | |
| Olstrup | city | Denmark | 55.32 | 12.17 | 55 | 4821 | |
| Olstrup | city | Denmark | 55.28 | 12.05 | 127 | 6032 | |
| Onsevig | city | Denmark | 54.93 | 11.12 | 9 | 1591 | |
| Onslev | city | Denmark | 54.85 | 11.87 | 32 | 8408 | |
| Opager | city | Denmark | 54.77 | 11.30 | 16 | 1163 | |
| Ore | city | Denmark | 54.80 | 11.22 | 3 | 4411 | |
| Ore | city | Denmark | 55.00 | 11.88 | 0 | 8794 | |
| Ore | city | Denmark | 54.88 | 12.08 | 3 | 3214 | |
| Ore og Gallemander | city | Denmark | 55.00 | 11.88 | 0 | 8794 | |
| Oreby | city | Denmark | 55.03 | 11.83 | 16 | 4055 | |
| Oreby | city | Denmark | 54.83 | 11.63 | 16 | 5098 | |
| Orebygård | city | Denmark | 54.82 | 11.60 | 6 | 4297 | |
| Oregaard | city | Denmark | 55.03 | 11.85 | 16 | 6865 | |
| Oregård | city | Denmark | 55.03 | 11.85 | 16 | 6865 | |
| Orehavegard | city | Denmark | 54.88 | 11.22 | 32 | 2951 | |
| Orehoved | city | Denmark | 54.95 | 11.87 | 3 | 2851 | |
| Oringe | city | Denmark | 54.98 | 11.92 | 0 | 6809 | |
| Orslev | city | Denmark | 55.03 | 11.98 | 137 | 11642 | |
| Orslev Kohave | city | Denmark | 55.02 | 11.98 | 196 | 11389 | |
| Orslev Lillevang | city | Denmark | 55.05 | 11.95 | 114 | 11012 | |
| Orslokke | city | Denmark | 54.90 | 11.25 | 16 | 1560 | |
| Orup | city | Denmark | 55.20 | 12.08 | 65 | 3664 | |
| Oster Egesborg | city | Denmark | 55.03 | 12.03 | 193 | 5975 | |
| Oster Karleby | city | Denmark | 54.87 | 11.20 | 32 | 6300 | |
| Oster Kippinge | city | Denmark | 54.90 | 11.80 | 16 | 4302 | |
| Oster Kippinge | city | Denmark | 54.90 | 11.82 | 62 | 4830 | |
| Oster Nordlunde | city | Denmark | 54.88 | 11.23 | 32 | 2269 | |
| Oster Skorringe | city | Denmark | 54.75 | 11.40 | 29 | 1781 | |
| Oster Skovby | city | Denmark | 54.78 | 11.22 | 3 | 2646 | |
| Oster Ulslev | city | Denmark | 54.70 | 11.63 | 49 | 2011 | |
| Osterby | city | Denmark | 54.95 | 11.45 | 16 | 315 | |
| Ostermark | city | Denmark | 55.00 | 12.38 | 95 | 1974 | |
| Osterskovgard | city | Denmark | 54.73 | 11.13 | 0 | 337 | |
| Ostofte | city | Denmark | 54.80 | 11.43 | 32 | 3377 | |
| Ottegaard | city | Denmark | 55.23 | 11.67 | 36 | 9775 | |
| Ottegård | city | Denmark | 55.23 | 11.67 | 36 | 9775 | |
| Ottelundsgaard | city | Denmark | 54.67 | 11.40 | 9 | 4884 | |
| Ottelundsgård | city | Denmark | 54.67 | 11.40 | 9 | 4884 | |
| Over Even | city | Denmark | 55.20 | 11.93 | 196 | 3408 | |
| Over Vindinge | city | Denmark | 55.07 | 11.90 | 22 | 8425 | |
| Overdrevsgaard | city | Denmark | 55.10 | 12.08 | 16 | 4592 | |
| Overdrevsgard | city | Denmark | 55.10 | 12.08 | 16 | 4592 | |
| Overup | city | Denmark | 54.82 | 11.92 | 32 | 12592 | |
| Overup | city | Denmark | 55.25 | 11.82 | 131 | 21234 | |
| Ovstrup | city | Denmark | 54.85 | 11.92 | 32 | 5869 |