- Order of Calanthe. West Virginia. Grand Council.1
- Order of United Commercial Travelers of America. Parkersburg Council No. 35.1
- Order of the Eastern Star. Grand Chapter of West Virginia.1
- Order of the Eastern Star. Grand Chapter of West Virginia. Parkersburg Chapter No. 14 (Parkersburg, W. Va.)4
- Order of the Eastern Star. Grand Chapter of West Virginia. Shinnston Chapter No. 103 (Shinnston, W. Va.)1
- Order of the Eastern Star. Grand Chapter of West Virginia. Tiskelwah Chapter No. 45 (Charleston, W. Va.)1
- Organization of American Historians.1
- Organization of American Historians. Committee on Public History.1
- Orr, Allen A.1
- Orr, Ed.1
- Orrahood, M. David.1
- Ortmeyer, Carl E.3
- Orton, C. R. (Clayton Roberts), b. 1885.7
- Ostrom, Peter, 1870-1
- Oswald, Brandi.1
- Ota, Hajime.1
- Ours, G. Fred.1
- Over the Teacups (Morgantown, W. Va.)1
- Owens, Lane and Dyer Machine Company.1
- Owings, C. W. (Clarence Watson), 1894-2
