| Ohio State University Golf Club | Columbus | Ohio |  United States of America | inactive |
| Ohio University Golf Course | Athens | Ohio | United States of America | inactive |
| Ohiradai Country Club | Tochigi | Tochigi |  Japan | inactive |
| Ohmurawan Country Club - New Course | Omura | Nagasaki | Japan | inactive |
| Ohmurawan Country Club - Old Course | Omura | Nagasaki | Japan | inactive |
| Ohope International Golf Club | Ohope | Bay of Plenty |  New Zealand | inactive |
| Ohotsuku Country Club | Abashiri | Hokkaido | Japan | inactive |
| Ohsumi Country Club | Osaki | Kagoshima | Japan | inactive |
| Ohtakijo Golf Club | Isumi | Chiba | Japan | inactive |
| Ohtama Taiga Country Club | Otama | Fukushima | Japan | inactive |
| Ohtone Country Club | Bando | Ibaraki | Japan | inactive |
| Ohtsuki Country Club | Otsuki | Yamanashi | Japan | inactive |
| Ohyama Camellia Country Club | Toyama | Toyama | Japan | inactive |
| Öijared Resort | Floda | Västra Götaland |  Sweden | inactive |
| Oil Field Recreation Association Golf Course | Healdton | Oklahoma | United States of America | inactive |
| Oirase | Towadako | Aomori | Japan | inactive |
| Oishi | Otsu | Shiga | Japan | inactive |
| Oiso | Ashigarakami | Kanagawa | Japan | inactive |
| Oita Chuo Golf Club | Oita | Oita | Japan | inactive |
| Oita Country Club - Tsukigata Course | Oita | Oita | Japan | inactive |
| Oita Country Club - Yoshino Course | Oita | Oita | Japan | inactive |
| Oita Fujimi Country Club | Oita | Oita | Japan | inactive |
| Oita Public Golf Course | Oita | Oita | Japan | inactive |
| Oita Sunny Hills Golf Club | Oita | Oita | Japan | inactive |
| Oita Takenaka Country Club | Oita | Oita | Japan | inactive |
| Oita Tokyu Golf Club | Oita | Oita | Japan | inactive |
| Oitavos Dunes | Cascais | Lisbon |  Portugal | inactive |
| Oitavos Dunes | Cascais | Lisbon | Portugal | Active |
| Oitavos Dunes | Cascais | Lisboa e Setúbal | Portugal | inactive |
| Ojai Valley Inn & Spa | Ojai | California | United States of America | inactive |
| Öjestrand Golf Club | Njurunda | Västernorrland | Sweden | inactive |
| Ojibwa Golf & Bowl | Chippewa Falls | Wisconsin | United States of America | inactive |
| Ojiya Country Club | Ochiiya | Niigata | Japan | inactive |
| Ojiyama Country Club | Otsu | Shiga | Japan | inactive |
| OK Country Club | Wanju | North Jeolla |  South Korea | inactive |
| Okabe Chisan Country Club | Fukaya | Saitama | Japan | inactive |
| Okadaira Golf Links | Inashiki | Ibaraki | Japan | inactive |
| Okaihau Golf Club | Okaihau | Northland | New Zealand | inactive |
| Okanagan Golf Club | Kelowna | British Columbia |  Canada | inactive |
| Okanogan Valley Golf Club | Omak | Washington | United States of America | inactive |
| Okanokouen Kiyosato Golf Course | Hokuto | Yamanashi | Japan | inactive |
| Okatie Creek Golf Club | Bluffton | South Carolina | United States of America | inactive |
| Okatoma Golf Club | Collins | Mississippi | United States of America | inactive |
| Okayama Country Club - Momonosato Course | Okayama | Okayama | Japan | inactive |
| Okayama Golf Club - Obie Course | Kurashiki | Okayama | Japan | inactive |
| Okayama Kasumibashi Golf Club | Kurashiki | Okayama | Japan | inactive |
| Okayama Kinryo Country Club | Okayama | Okayama | Japan | inactive |
| Okayama Kita Golf Club | Okayama | Okayama | Japan | inactive |
| Okayama Kokusai Golf Club | Soja | Okayama | Japan | inactive |
| Okayama Kuko Golf Club | Okayama | Okayama | Japan | inactive |