| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Odderbaek | city | Denmark | 55.92 | 9.32 | 265 | 1467 | |
| Odderbæk | city | Denmark | 55.92 | 9.32 | 265 | 1467 | |
| Oddersted | city | Denmark | 55.53 | 9.60 | 59 | 18072 | |
| Odis | city | Denmark | 55.40 | 9.40 | 141 | 1543 | |
| Odis Bramdrup | city | Denmark | 55.38 | 9.37 | 131 | 1595 | |
| Odsted | city | Denmark | 55.65 | 9.42 | 232 | 4312 | |
| Oens | city | Denmark | 55.82 | 9.78 | 170 | 17900 | |
| Ogelund | city | Denmark | 55.85 | 9.08 | 190 | 1341 | |
| Oksviggaard | city | Denmark | 55.65 | 9.48 | 236 | 10528 | |
| Oksviggård | city | Denmark | 55.65 | 9.48 | 236 | 10528 | |
| Olholm | city | Denmark | 55.83 | 9.53 | 265 | 3655 | |
| Ollerup | city | Denmark | 55.73 | 9.38 | 232 | 3059 | |
| Olsted Nederholm | city | Denmark | 55.80 | 9.77 | 180 | 13522 | |
| Olsted Overholm | city | Denmark | 55.80 | 9.78 | 180 | 13990 | |
| Omkuler | city | Denmark | 55.70 | 9.52 | 180 | 28217 | |
| Orbaek | city | Denmark | 55.90 | 10.00 | 111 | 3124 | |
| Ornsholt | city | Denmark | 55.88 | 9.43 | 223 | 2438 | |
| Ornstrup | city | Denmark | 55.82 | 9.82 | 173 | 21679 | |
| Orreslev | city | Denmark | 55.93 | 9.95 | 226 | 9064 | |
| Orridslev | city | Denmark | 55.93 | 9.95 | 226 | 9064 | |
| Orskov | city | Denmark | 55.93 | 9.92 | 180 | 13177 | |
| Orum | city | Denmark | 55.73 | 9.75 | 193 | 4864 | |
| Ostbirk | city | Denmark | 55.97 | 9.77 | 216 | 3768 | |
| Ostedgaard | city | Denmark | 55.60 | 9.68 | 42 | 21398 | |
| Ostedgard | city | Denmark | 55.60 | 9.68 | 42 | 21398 | |
| Oster Ast | city | Denmark | 55.73 | 9.23 | 295 | 2158 | |
| Oster Bisholt | city | Denmark | 55.82 | 9.98 | 78 | 2177 | |
| Oster Grundet | city | Denmark | 55.73 | 9.58 | 262 | 26106 | |
| Oster Snede | city | Denmark | 55.78 | 9.65 | 209 | 15197 | |
| Oster Starup | city | Denmark | 55.60 | 9.45 | 180 | 6579 | |
| Oster Torsted | city | Denmark | 55.60 | 9.23 | 229 | 2688 | |
| Oster Vamdrup | city | Denmark | 55.42 | 9.32 | 144 | 6964 | |
| Osterbygard | city | Denmark | 55.40 | 9.32 | 134 | 5792 | |
| Ostergard | city | Denmark | 55.47 | 9.63 | 39 | 6981 | |
| Osterlund | city | Denmark | 55.88 | 9.78 | 85 | 20882 | |
| Osterskov | city | Denmark | 55.60 | 9.67 | 49 | 20294 | |
| Osterskovgard | city | Denmark | 55.43 | 9.63 | 0 | 5282 | |
| Ostrup | city | Denmark | 55.80 | 10.03 | 26 | 1481 | |
| Oustrup | city | Denmark | 55.63 | 9.33 | 246 | 3658 | |
| Over Astrup | city | Denmark | 55.93 | 9.60 | 213 | 4130 | |
| Over Barrit | city | Denmark | 55.70 | 9.87 | 154 | 3324 | |
| Over Hovedgaard | city | Denmark | 55.95 | 9.98 | 311 | 4451 | |
| Over Ustrup | city | Denmark | 55.80 | 9.88 | 104 | 12736 | |
| Over Vrigsted | city | Denmark | 55.73 | 9.85 | 269 | 4595 | |
| Overby | city | Denmark | 55.75 | 10.02 | 49 | 3959 | |
| Overby | city | Denmark | 55.97 | 9.90 | 328 | 5109 | |
| Overhol | city | Denmark | 55.63 | 9.73 | 3 | 14833 | |
| Overholm | city | Denmark | 55.80 | 9.78 | 180 | 13990 | |
| Overhøl | city | Denmark | 55.63 | 9.73 | 3 | 14833 | |
| Ovstrup | city | Denmark | 55.63 | 9.33 | 246 | 3658 |