The title Earl of Eglinton is a peerage title in the Peerage of Scotland. In 1859 the thirteenth Earl of Eglinton, Archibald Montgomerie, was also created Earl of Winton in the Peerage of the United Kingdom, and both earldoms have been united since. Furthermore, other titles are held with the Earldoms are: Lord Montgomerie (created 1449), Baron Ardrossan (1806) and Baron Seton and Tranent (1859). The first is in the Peerage of Scotland, while the latter two are in the Peerage of the United Kingdom.

Lords Montgomerie (1449)

• Alexander Montgomerie, 1st Lord Montgomerie (d. c. 1470)
• Hugh Montgomerie, 2nd Lord Montgomerie (c. 1460-1545) (became Earl of Eglinton in 1508)

Earls of Eglinton (1508)

• Hugh Montgomerie, 1st Earl of Eglinton (c. 1460-1545)
• Hugh Montgomerie, 2nd Earl of Eglinton (d. 1546)
• Hugh Montgomerie, 3rd Earl of Eglinton (d. 1585)
• Hugh Montgomerie, 4th Earl of Eglinton (1563-1586)
• Hugh Montgomerie, 5th Earl of Eglinton (d. 1612)
• Alexander Montgomerie, 6th Earl of Eglinton (d. 1661)
• Hugh Montgomerie, 7th Earl of Eglinton (1613-1669)
• Alexander Montgomerie, 8th Earl of Eglinton (d. 1701)
• Alexander Montgomerie, 9th Earl of Eglinton (c. 1660-1729)
• Alexander Montgomerie, 10th Earl of Eglinton (1723-1769)
• Archibald Montgomerie, 11th Earl of Eglinton (1726-1796)
• Hugh Montgomerie, 12th Earl of Eglinton (1739-1819)
• Archibald Montgomerie, 13th Earl of Eglinton, 1st Earl of Winton (1812-1861)
• Archibald William Montgomerie, 14th Earl of Eglinton, 2nd Earl of Winton (1841-1892)
• George Arnulph Montgomerie, 15th Earl of Eglinton, 3rd Earl of Winton (1848-1919)
• Archibald Seton Montgomerie, 16th Earl of Eglinton, 4th Earl of Winton (1880-1945)
• Archibald William Alexander Montgomerie, 17th Earl of Eglinton, 5th Earl of Winton (1914-1966)
• Archibald George Montgomerie, 18th Earl of Eglinton, 6th Earl of Winton (b. 1939)