Lord Ochiltree (or Ochiltrie) of Lord Stuart of Ochiltree was a title in the Peerage of Scotland. In 1542 Andrew Stewart, 2nd Lord Avondale (see the Earl Castle Stewart for earlier history of the family) exchanged the lordship of Avondale with Sir James Hamilton for the lordship of Ochiltrie and by Act of Parliament was ordained to be styled Lord Stuart of Ochiltrie. His great-grandson, the third Lord Stuart of Ochiltrie, resigned the feudal barony of Ochiltree and the peerage to his cousin, Sir James Stuart, with the consent of the Crown in 1615. In 1619 he was instead elevated to the Peerage of Ireland as Baron Castle Stewart; see the Earl Castle Stewart for further history of this branch of the family).