James O'Hara

• James O'Hara, 2nd Baron Tyrawley, British Army officer
• James E. O'Hara, U.S. Representative from North Carolina
• James G. O'Hara, U.S. Representative from Michigan
• James O'Hara (announcer), Scottish former television announcer, now audio description specialist
• James O'Hara (quartermaster), Continental Army officer, U.S. Army quartermaster
• * USS James O'Hara, a Frederick Funston-class attack transport
• James O'Hara (actor), Irish-born American actor
• James O'Hara (Latinist), American scholar of Latin literature
• James O'Hara, Irish politician, Member of Parliament for Galway Borough 1826–1831
• James O'Hara (singer), American country singer