The title Earl of Galloway was created in the Peerage of Scotland in 1623 for Alexander Stewart. The Earl also holds the subsidiarys title of Lord Garlies (created 1607) and Baron Stewart of Garlies (1796). The former is in the Peerage of Scotland, and the latter in the Peerage of Great Britain.

Earls of Galloway (1623)

• Alexander Stewart, 1st Earl of Galloway (d. 1649)
• James Stewart, 2nd Earl of Galloway (c. 1610-1671)
• Alexander Stewart, 3rd Earl of Galloway (c. 1643-1690)
• Alexander Stewart, 4th Earl of Galloway (1660-1694)
• James Stewart, 5th Earl of Galloway (d. 1746)
• Alexander Stewart, 6th Earl of Galloway (c. 1694-1773)
• John Stewart, 7th Earl of Galloway (1736-1806)
• George Stewart, 8th Earl of Galloway (1768-1834)
• Randolph Stewart, 9th Earl of Galloway (1800-1873)
• Alan Plantagenet Stewart, 10th Earl of Galloway (1835-1901)
• Randolph Henry Stewart, 11th Earl of Galloway (1836-1902)
• Randolph Algernon Ronald Stewart, 12th Earl of Galloway (1892-1978)
• Randolph Keith Reginald Stewart, 13th Earl of Galloway (b. 1928)