- O'Brien, Richard J.2
- Oglebay, Crispin.2
- Ohio County Medical Society (Wheeling, W. Va.)2
- Ohio River Railroad Company.2
- Ohio Valley Academy of Dentistry.2
- Ohio Valley Board of Trade (Wheeling, W. Va.)2
- Ohio Valley Environmental Coalition (Huntington, W. Va.)2
- Ohio Valley Industrial Corporation (Wheeling, W. Va.)2
- Ohio. Department of Natural Resources. Division of Parks and Recreation.2
- Oldaker, E. C.2
- Operators' Association of the Williamson Field.2
- Owings, C. W. (Clarence Watson), 1894-2
- Parkersburg (W. Va.). Board of Commerce.2
- Parkersburg (W. Va.). Laws, etc.2
- Parkersburg Art Center (Parkersburg, W. Va.)2
- Parkersburg Automobile Club (Parkersburg, W. Va.)2
- Parkersburg Board of Commerce (Parkersburg, W. Va.)2
- Parsons, Dickson Ward, 1881-2
- Pavlech, Helen Mary.2
- Pennant, Elias.2
