James Mortimer

• James Mortimer (chess player), American/British chess player, journalist, and playwright
• James Mortimer (dogshow judge), British dogshow judge
• Jim Mortimer, British trade unionist and General Secretary of the Labour Party
• William James Mortimer, publisher, president and editor of the Deseret News
• James Mortimer (hurdler), New Zealand hurdler
• The [Hound of the Baskervilles#Plot|James Mortimer], a character in ''The Hound of the Baskervilles''