The Lockhart, later Lockhart-Ross Baronetcy, of Carstairs in the County of Lanark, was created in the Baronetage of Nova Scotia on 28 February 1672. For more information on this creation, see Lockhart-Ross baronets.
The Lockhart Baronetcy, of Lee in the County of Lanark, was created in the Baronetage of the United Kingdom on 24 May 1806 for Alexander Lockhart, Member of Parliament for Berwick-upon-Tweed. The title became extinct on the death of the fifth Baronet in 1919.
Lockhart, later Lockhart-Ross baronets, of Carstairs (1672)
Lockhart baronets, of Lee (1806)
- Sir Alexander Macdonald Lockhart, 1st Baronet (died 1816)
- Sir Charles Macdonald Lockhart, 2nd Baronet (1799–1832)
- Sir Norman Macdonald Lockhart, 3rd Baronet (1802–1849)
- Sir Norman Macdonald Lockhart, 4th Baronet (1845–1870)
- Sir Simon Macdonald Lockhart, 5th Baronet (1849–1919)