| 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 |
| Okayama Mitsu Country Club | Kita | Okayama | Japan | inactive |
| Okayama Nishi Golf Club | Ibara | Okayama | Japan | inactive |
| Okazaki Country Club | Okazaki | Aichi | Japan | inactive |
| Okeechobee Executive Golf Course | The Villages | Florida | United States of America | inactive |
| Okeeheelee Golf Course | West Palm Beach | Florida | United States of America | inactive |
| Okeene Golf Club | Okeene | Oklahoma | United States of America | inactive |
| Okefenokee Country Club | Blackshear | Georgia | United States of America | inactive |
| Okehampton Golf Club | Okehampton | Devon |  England | inactive |
| Okemah Golf Course | Okemah | Oklahoma | United States of America | inactive |
| Okemo Valley Golf Club | Ludlow | Vermont | United States of America | inactive |
| Okgwakian Country Club | Gokseong | South Jeolla | South Korea | inactive |
| Okinawa Country Club | Nakagami | Okinawa | Japan | inactive |
| Okinawa Country Club | Monte Grande | Buenos Aires |  Argentina | inactive |
| Okinawa Kokusai Golf Club | Kunigami | Okinawa | Japan | inactive |
| Okinawa Royal Golf Club | Uruma | Okinawa | Japan | inactive |
| Okkala Golf Resort | Yangon | Yangon |  Myanmar | inactive |
| Oklahoma City Golf & Country Club | Oklahoma City | Oklahoma | United States of America | inactive |
| Öko Golf Neusiedlercsarda | Neusiedl am See | Burgenland |  Austria | inactive |
| Okoboji View Golf Course | Spirit Lake | Iowa | United States of America | inactive |
| Okoroire Golf Club | Okoroire | Waikato | New Zealand | inactive |
| Okudogo Golf Club | Matsuyama | Ehime | Japan | inactive |
| Okura Country Club | Nishikata | Tochigi | Japan | inactive |
| Okutama | Akiruno | Tokyo | Japan | inactive |