| Frank O'Hara | American poet and artist Frank O'Hara |
| John O'Hara | American novelist John O'Hara |
| Journalists | O'Hara journalists and columnists |
| Literary Agents | O'Hara literary agents |
| Non-Literary Authors | O'Hara authors of business, technical books, etc. |
| O'Hara Characters in Literature | O'Hara characters in literary works |
| Other O'Hara Writers | Other O'Haras of literary or journalist renown |
| Publishers | O'Hara publishers, etc. |