| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obdam | city | Provincie Noord-Holland | Netherlands | 52.6833333 | 4.9 | -6 | 36901 |
| Oever | city | Provincie Noord-Holland | Netherlands | 52.9333333 | 5.0333333 | 3 | 6530 |
| Omval | city | Provincie Noord-Holland | Netherlands | 52.6166667 | 4.7833333 | -13 | 94480 |
| Onderdijk | city | Provincie Noord-Holland | Netherlands | 52.75 | 5.1333333 | 3 | 26519 |
| Ongeren | city | Provincie Noord-Holland | Netherlands | 53.0666667 | 4.8 | 6 | 6148 |
| Oost | city | Provincie Noord-Holland | Netherlands | 53.1 | 4.9 | 0 | 3584 |
| Oost-Graftdijk | city | Provincie Noord-Holland | Netherlands | 52.55 | 4.8166667 | -6 | 27063 |
| Oost-Knollendam | city | Provincie Noord-Holland | Netherlands | 52.5166667 | 4.8 | -6 | 55787 |
| Oostbeemster | city | Provincie Noord-Holland | Netherlands | 52.5666667 | 4.9833333 | -6 | 43728 |
| Oostdorp | city | Provincie Noord-Holland | Netherlands | 52.6666667 | 4.7 | -3 | 41974 |
| Oosteinde | city | Provincie Noord-Holland | Netherlands | 52.2833333 | 4.8 | -9 | 102331 |
| Oosterblokker | city | Provincie Noord-Holland | Netherlands | 52.6666667 | 5.1166667 | -3 | 60501 |
| Oosterbuurt | city | Provincie Noord-Holland | Netherlands | 52.55 | 4.6833333 | 3 | 70586 |
| Oosterdijk | city | Provincie Noord-Holland | Netherlands | 52.75 | 5.2666667 | 3 | 30387 |
| Oostereind | city | Provincie Noord-Holland | Netherlands | 53.0833333 | 4.8833333 | 3 | 2479 |
| Oosterend | city | Provincie Noord-Holland | Netherlands | 53.0833333 | 4.8833333 | 3 | 2479 |
| Oostereng | city | Provincie Noord-Holland | Netherlands | 52.2666667 | 5.2 | 65 | 124564 |
| Oostergouw | city | Provincie Noord-Holland | Netherlands | 52.6833333 | 5.2333333 | 3 | 39207 |
| Oosterklief | city | Provincie Noord-Holland | Netherlands | 52.9 | 4.9666667 | -3 | 9604 |
| Oosterland | city | Provincie Noord-Holland | Netherlands | 52.9333333 | 5.0166667 | 3 | 6530 |
| Oosterleek | city | Provincie Noord-Holland | Netherlands | 52.6333333 | 5.2 | 0 | 20031 |
| Oosterwijzend | city | Provincie Noord-Holland | Netherlands | 52.6833333 | 5.1833333 | 3 | 34142 |
| Oosterzij | city | Provincie Noord-Holland | Netherlands | 52.5833333 | 4.7 | 3 | 70586 |
| Oosthuizen | city | Provincie Noord-Holland | Netherlands | 52.5666667 | 5 | -6 | 37882 |
| Oostmijzen | city | Provincie Noord-Holland | Netherlands | 52.6 | 4.9333333 | -13 | 14720 |
| Oostwoud | city | Provincie Noord-Holland | Netherlands | 52.7333333 | 5.0833333 | -6 | 29750 |
| Oostzaan | city | Provincie Noord-Holland | Netherlands | 52.45 | 4.8666667 | -3 | 162565 |
| Opmeer | city | Provincie Noord-Holland | Netherlands | 52.7 | 4.95 | -3 | 24493 |
| Opperdoes | city | Provincie Noord-Holland | Netherlands | 52.7666667 | 5.0833333 | -6 | 14861 |
| Osdorp | city | Provincie Noord-Holland | Netherlands | 52.3666667 | 4.7833333 | -3 | 173698 |
| Oterleek | city | Provincie Noord-Holland | Netherlands | 52.6333333 | 4.8333333 | -13 | 86658 |
| Oud Valkeveen | city | Provincie Noord-Holland | Netherlands | 52.3 | 5.2 | 32 | 95655 |
| Oud-Diemen | city | Provincie Noord-Holland | Netherlands | 52.35 | 4.9666667 | -6 | 247653 |
| Oude Diemen | city | Provincie Noord-Holland | Netherlands | 52.35 | 4.9666667 | -6 | 247653 |
| Oude Meer | city | Provincie Noord-Holland | Netherlands | 52.2833333 | 4.7666667 | -6 | 73584 |
| Oude Schans | city | Provincie Noord-Holland | Netherlands | 53.0333333 | 4.8166667 | 3 | 5498 |
| Oude-Niedorp | city | Provincie Noord-Holland | Netherlands | 52.7166667 | 4.8833333 | -6 | 28780 |
| Oudendijk | city | Provincie Noord-Holland | Netherlands | 52.6 | 4.9666667 | -6 | 18023 |
| Ouder Amstel | city | Provincie Noord-Holland | Netherlands | 52.3 | 4.9 | -6 | 206745 |
| Ouderkerk | city | Provincie Noord-Holland | Netherlands | 52.3 | 4.9 | -6 | 206745 |
| Ouderkerk aan de Amstel | city | Provincie Noord-Holland | Netherlands | 52.3 | 4.9 | -6 | 206745 |
| Oudeschild | city | Provincie Noord-Holland | Netherlands | 53.0333333 | 4.8666667 | 0 | 2450 |
| Oudesluis | city | Provincie Noord-Holland | Netherlands | 52.8333333 | 4.8166667 | -3 | 26532 |
| Oudijk | city | Provincie Noord-Holland | Netherlands | 52.6833333 | 5.1166667 | -3 | 60501 |
| Oudkarspel | city | Provincie Noord-Holland | Netherlands | 52.7 | 4.8 | -6 | 82500 |
| Oudorp | city | Provincie Noord-Holland | Netherlands | 52.6333333 | 4.7833333 | -13 | 125418 |
| Over-Diemen | city | Provincie Noord-Holland | Netherlands | 52.3333333 | 5 | -3 | 113225 |
| Overdie | city | Provincie Noord-Holland | Netherlands | 52.6166667 | 4.75 | -9 | 94480 |
| Overmeer | city | Provincie Noord-Holland | Netherlands | 52.25 | 5.05 | -9 | 33996 |
| Overtoomseveld | city | Provincie Noord-Holland | Netherlands | 52.3666667 | 4.8333333 | -6 | 258356 |
| Overveen | city | Provincie Noord-Holland | Netherlands | 52.4 | 4.6 | 13 | 164117 |
| Overwhere | city | Provincie Noord-Holland | Netherlands | 52.5166667 | 4.9666667 | -6 | 81160 |
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