Major James Fraser of Castle Leathers (or Castleleathers) (1670 – 1760) was a Scottish soldier who supported the British-Hanoverian Government during the Jacobite risings of the 18th-century and was an important member of the Clan Fraser of Lovat, a clan of the Scottish Highlands. He is also known for his quarrels with his clan chief, Simon Fraser, 11th Lord Lovat who switched sides several times during the Jacobite risings.