| OH&CC | Oberon Heritage and Collectors Club 
| Others |
| OHCC | Oak Harbor Conservation Club
| Others |
| OHCC | Oak Hill Christian Center
| Others |
| OHCC | Oak Hill Country Club
| Others |
| OHCC | Oak Hills Christian College
| Others |
| OHCC | Oakland Hills Community Church
| Others |
| OHCC | Oakland Hills Country Club
| Others |
| OHCC | Occupational Health Clinical Center
| Others |
| OHCC | Occupational Health Clinical Centers
| Others |
| OHCC | Ocean Hills Country Club
| Others |
| OHCC | Officer of Healthcare Compliance Certified
| Others |
| OHCC | Oil Heat Comfort Corp
| Others |
| OHCC | Old Hickory Coal Company
| Others |
| OHCC | Old Hickory Country Club
| Others |
| OHCC | Old Hill Cricket Club
| Others |
| OHCC | Onetta Harris Community Center
| Others |
| OHCC | Online and Hybrid Certification Course
| Others |
| OHCC | Ontario Healthy Communities Coalition
| Others |
| OHCC | Open Health Care Clinic
| Others |
| OHCC | Oracle House Christian Church
| Others |
| OHCC | Oral Health Coordinating Committee
| Others |
| OHCC | Orchard Hills Country Club
| Others |
| OHCC | Oregon Home Care Commission
| Others |
| OHCC | Orlando Homeschool Chess Club
| Others |
| OHCC | Out of Home Child Care
| Others |
| OHCC | Outer Harbour Centreboard Club
| Others |
| OHCC | Oxford Hills Chamber of Commerce
| Others |