| OLGC | Office of Lesbian and Gay Concerns (Unitarian Universalist Association) 
| Others |
| OLGC | Office of the Liquor and Gambling Commissioner (South Australia, Australia)
| Others |
| OLGC | Osteoclast-Like Giant Cell (tumor)
| Others |
| OLGC | Our Lady of Good Counsel
| Others |
| OLGC | Our Lady of Guadalupe Colleges
| Others |