| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Op Linkebeek | city | Province de )) (( Brabant | Belgium | 50.7666667 | 4.35 | 331 | 259215 |
| Op Merlemont | city | Provincie Limburg | Belgium | 50.8833333 | 5.4 | 141 | 40228 |
| Op Sint-Antonius Berg | city | Provincie Limburg | Belgium | 50.8666667 | 5.6166667 | 242 | 45281 |
| Op de Baan Dries | city | Provincie Limburg | Belgium | 51.0333333 | 5.1666667 | 127 | 33303 |
| Op de Berg | city | Provincie Limburg | Belgium | 50.8833333 | 5.6166667 | 232 | 39288 |
| Op de Dieken | city | Provincie Limburg | Belgium | 51.1333333 | 5.7166667 | 104 | 20386 |
| Op de Vlucht | city | Provincie Limburg | Belgium | 51.05 | 5.0666667 | 101 | 29520 |
| Op den Beek | city | Provincie Limburg | Belgium | 50.7833333 | 5.3166667 | 219 | 18080 |
| Op den Berg | city | Provincie Limburg | Belgium | 51.0833333 | 5.6833333 | 150 | 20479 |
| Op het Root | city | Provincie Limburg | Belgium | 50.85 | 5.5833333 | 301 | 31919 |
| Op-Aygem | city | Provincie Oost-Vlaanderen | Belgium | 50.8833333 | 3.9166667 | 150 | 44528 |
| Opaaigem | city | Provincie Oost-Vlaanderen | Belgium | 50.8833333 | 3.9166667 | 150 | 44528 |
| Opbeek | city | Province de )) (( Brabant | Belgium | 50.8 | 4.2166667 | 196 | 103246 |
| Opbrakel | city | Provincie Oost-Vlaanderen | Belgium | 50.7833333 | 3.75 | 255 | 21200 |
| Opdorp | city | Provincie Oost-Vlaanderen | Belgium | 51.0333333 | 4.2166667 | 16 | 45493 |
| Opgeldenaken | city | Province de )) (( Brabant | Belgium | 50.7 | 4.85 | 367 | 11379 |
| Opglabbeek | city | Provincie Limburg | Belgium | 51.05 | 5.5833333 | 236 | 26897 |
| Opgrimbie | city | Provincie Limburg | Belgium | 50.9333333 | 5.6833333 | 147 | 57790 |
| Opgrimby | city | Provincie Limburg | Belgium | 50.9333333 | 5.6833333 | 147 | 57790 |
| Ophain | city | Province de )) (( Brabant | Belgium | 50.6833333 | 4.1833333 | 196 | 41144 |
| Ophain | city | Province de )) (( Brabant | Belgium | 50.6666667 | 4.35 | 403 | 65476 |
| Ophain-Bois-Seigneur-Isaac | city | Province de )) (( Brabant | Belgium | 50.6666667 | 4.35 | 403 | 65476 |
| Ophalfen | city | Province de )) (( Brabant | Belgium | 50.8666667 | 4.2 | 98 | 56869 |
| Ophasselt | city | Provincie Oost-Vlaanderen | Belgium | 50.8166667 | 3.8833333 | 95 | 33601 |
| Opheers | city | Provincie Limburg | Belgium | 50.7333333 | 5.2833333 | 393 | 22911 |
| Ophem | city | Provincie Oost-Vlaanderen | Belgium | 50.8333333 | 3.9333333 | 131 | 36720 |
| Ophem | city | Province de )) (( Brabant | Belgium | 50.9333333 | 4.3 | 170 | 114210 |
| Ophem | city | Province de )) (( Brabant | Belgium | 50.8333333 | 4.4833333 | 295 | 148937 |
| Ophem | city | Province de )) (( Brabant | Belgium | 50.8333333 | 4.65 | 206 | 39722 |
| Opheylissem | city | Province de )) (( Brabant | Belgium | 50.75 | 4.9833333 | 246 | 18214 |
| Ophoven | city | Provincie Limburg | Belgium | 51.0333333 | 5.5666667 | 255 | 36987 |
| Ophoven | city | Provincie Limburg | Belgium | 51.0833333 | 5.5666667 | 239 | 26897 |
| Ophoven | city | Provincie Limburg | Belgium | 51.1166667 | 5.8 | 82 | 29389 |
| Opitter | city | Provincie Limburg | Belgium | 51.1166667 | 5.65 | 141 | 19797 |
| Opleeuw | city | Provincie Limburg | Belgium | 50.8166667 | 5.3833333 | 229 | 23194 |
| Oplinter | city | Province de )) (( Brabant | Belgium | 50.8333333 | 4.9833333 | 131 | 28926 |
| Oplombeek | city | Province de )) (( Brabant | Belgium | 50.8 | 4.1166667 | 209 | 37252 |
| Opoeteren | city | Provincie Limburg | Belgium | 51.0666667 | 5.65 | 246 | 21716 |
| Opont | city | Province de Luxembourg | Belgium | 49.9333333 | 5.1166667 | 1158 | 3558 |
| Oppagne | city | Province de Luxembourg | Belgium | 50.3 | 5.5166667 | 971 | 4577 |
| Oppem | city | Provincie Oost-Vlaanderen | Belgium | 50.8333333 | 3.9333333 | 131 | 36720 |
| Oppem | city | Province de )) (( Brabant | Belgium | 50.9333333 | 4.3 | 170 | 114210 |
| Oppem | city | Province de )) (( Brabant | Belgium | 50.8333333 | 4.4833333 | 295 | 148937 |
| Oppem | city | Province de )) (( Brabant | Belgium | 50.8333333 | 4.65 | 206 | 39722 |
| Opperbuesinghen | city | Province de )) (( Brabant | Belgium | 50.8166667 | 4.1333333 | 183 | 35464 |
| Opperbuizingen | city | Province de )) (( Brabant | Belgium | 50.8166667 | 4.1333333 | 183 | 35464 |
| Opperbuzingen | city | Province de )) (( Brabant | Belgium | 50.8166667 | 4.1333333 | 183 | 35464 |
| Opperstraat | city | Province de )) (( Brabant | Belgium | 50.8666667 | 4.1 | 118 | 57412 |
| Opprebais | city | Province de )) (( Brabant | Belgium | 50.6833333 | 4.8 | 416 | 11498 |
| Oppuers | city | Provincie Antwerpen | Belgium | 51.0666667 | 4.25 | 9 | 44988 |
| Oppum | city | Provincie Limburg | Belgium | 50.9166667 | 5.2 | 127 | 28603 |
| Oppuurs | city | Provincie Antwerpen | Belgium | 51.0666667 | 4.25 | 9 | 44988 |
| Opsmeer | city | Provincie Oost-Vlaanderen | Belgium | 50.9666667 | 3.95 | 65 | 47522 |
| Opstal | city | Provincie Oost-Vlaanderen | Belgium | 50.9 | 3.7666667 | 183 | 32624 |
| Opstal | city | Provincie Oost-Vlaanderen | Belgium | 51 | 4.1833333 | 68 | 53379 |
| Opstal | city | Provincie Antwerpen | Belgium | 51.25 | 4.9 | 52 | 29082 |
| Opstal | city | Provincie Antwerpen | Belgium | 51.25 | 5 | 59 | 24922 |
| Opstal Dries | city | Provincie Oost-Vlaanderen | Belgium | 51 | 4.0333333 | 22 | 67369 |
| Opstaldries | city | Provincie Oost-Vlaanderen | Belgium | 50.8 | 3.8333333 | 114 | 29242 |
| Opvelp | city | Province de )) (( Brabant | Belgium | 50.8166667 | 4.8 | 262 | 20085 |
| Opwijk | city | Province de )) (( Brabant | Belgium | 50.9666667 | 4.1833333 | 104 | 53379 |
| Opwinkel | city | Provincie Limburg | Belgium | 51.1666667 | 5.7166667 | 101 | 28401 |
| Opwyck | city | Province de )) (( Brabant | Belgium | 50.9666667 | 4.1833333 | 104 | 53379 |
| Opzullik | city | Province de Hainaut | Belgium | 50.65 | 3.9166667 | 223 | 12557 |