| Oriole Golf Club | Margate | Florida |  United States of America | inactive |
| Orion Arashiyama Golf Club | Nakijin | Okinawa |  Japan | inactive |
| Oriskany Hill Golf Club | Oriskany | New York | United States of America | inactive |
| Orkney Golf Club | Orkney | North West |  South Africa | inactive |
| Orkney Golf Club | Kirkwall | Orkney Islands |  Scotland | inactive |
| Orleans Country Club | Orleans | Vermont | United States of America | inactive |
| Ormeau Golf Club | Belfast | Belfast | Northern Ireland | inactive |
| Ormehoj | Smørum | Hovedstaden |  Denmark | inactive |
| Ormonde Fields Golf Club | Ripley | Derbyshire | England | inactive |
| Ormskirk Golf Club | Ormskirk | Lancashire | England | inactive |
| Orna Golf Country Club | Bemban | Malacca |  Malaysia | inactive |
| Ørnehøj Golfklub | Gistrup | Nordjylland | Denmark | inactive |
| Örnsköldsviks Golfklubb Puttom | Arnäsvall | Västernorrland |  Sweden | inactive |
| Oro Valley Country Club | Tucson | Arizona | United States of America | inactive |
| Orofino Golf Course | Orofino | Idaho | United States of America | inactive |
| Oronoque Country Club | Stratford | Connecticut | United States of America | inactive |
| Oroville Golf Club | Oroville | Washington | United States of America | inactive |
| Orpington Golf Centre | Orpington | Kent | England | inactive |
| Orr Lake Golf Club | Elmvale | Ontario |  Canada | inactive |
| Orresta Golf & Konferens | Västerås | Västmanland | Sweden | inactive |
| Orroroo Golf Club | Orroroo | South Australia |  Australia | inactive |
| Orsett Golf Club | Orsett | Essex | England | inactive |
| Ørsted Fisk & Golf | Viby | Sjælland | Denmark | inactive |
| Ortonville Municipal Golf Course | Ortonville | Minnesota | United States of America | inactive |
| Oruro Golf Club | Capachos | Oruro |  Bolivia | inactive |
| Orust Golfklubb | Ellös | Västra Götaland | Sweden | inactive |
| Os Golf Course | Blonduos | Northwest |  Iceland | inactive |
| Osafune Country Club | Setouchi | Okayama | Japan | inactive |
| Osage Country Club | Linn | Missouri | United States of America | inactive |
| Osage National Golf Club | Lake Ozark | Missouri | United States of America | inactive |
| Osaka Bay | Izumisano | Osaka | Japan | inactive |
| Osaka Golf Club - Tannowa Course | Sennan | Osaka | Japan | inactive |
| Osaka Public Golf Course | Osaka | Osaka | Japan | inactive |
| Osakis Country Club | Osakis | Minnesota | United States of America | inactive |
| Osato Golf Club | Kurokawa | Miyagi | Japan | inactive |
| Osawatomie Golf Course | Osawatomie | Kansas | United States of America | inactive |
| Osborne Golf Club | East Cowes | Isle of Wight | England | inactive |
| Osceola Country Club | Osceola | Iowa | United States of America | inactive |
| Osceola Golf Course | Pensacola | Florida | United States of America | inactive |
| Osgood Golf Course | Fargo | North Dakota | United States of America | inactive |
| Oshawa Airport Golf Club | Oshawa | Ontario | Canada | inactive |
| Oshida Golf Club | Kitamurayama | Yamagata | Japan | inactive |
| Oshidori | Tomakomai | Hokkaido | Japan | inactive |
| Oshima | Ito | Shizuoka | Japan | inactive |
| Oshima Golf Club | Oshima | Tokyo | Japan | inactive |
| Oshitate | Kitasaku | Nagano | Japan | inactive |
| Oshkosh Country Club | Oshkosh | Wisconsin | United States of America | inactive |
| Oshkosh Country Club | Oshkosh | Nebraska | United States of America | inactive |
| Osiris Country Club | Walden | New York | United States of America | inactive |
| Oskarshamns Golfklubb | Oskarshamn | Kalmar | Sweden | inactive |