|Earldom of Eglinton|
|Monarch||James IV of Scotland|
|Peerage||Peerage of Scotland|
|First holder||Hugh Montgomerie, 3rd Lord Montgomerie|
|Present holder||Hugh Archibald William Montgomerie, 19th Earl of Eglinton, 7th Earl of Winton|
|Heir apparent||Rhuridh Seton Archibald Montgomerie, Lord Montgomerie|
|Subsidiary titles||Lord Montgomerie|
|Former seat(s)||Eglinton Castle|
In 1859, the thirteenth Earl of Eglinton, Archibald Montgomerie, was also created Earl of Winton in the Peerage of the United Kingdom, which gave him an automatic seat in the House of Lords, and both earldoms have been united since. Furthermore, other titles 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 (died c. 1470)
- Alexander Montgomerie, Master of Montgomerie (1404–1452)
- Alexander Montgomerie, 2nd Lord Montgomerie (died c. 1483)
- Hugh Montgomerie, 3rd Lord Montgomerie (c. 1460–1545) (created Earl of Eglinton in 1507)
Earls of Eglinton (1507)
- Hugh Montgomerie, 1st Earl of Eglinton (c. 1460–1545)
- (died 1546)
- Hugh Montgomerie, 3rd Earl of Eglinton (c. 1531–1585)
- Hugh Montgomerie, 4th Earl of Eglinton (1563–1586)
- (died 1612)
- Alexander Montgomerie, 6th Earl of Eglinton (1588–1661)
- Hugh Montgomerie, 7th Earl of Eglinton (1613–1669)
- (died 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 William 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 (1939–2018)
- (born 1966)
The heir apparent is the present holder's son, Rhuridh Seton Archibald Montgomerie, Lord Montgomerie (born 2007).
- Barony and Castle of Giffen
- Eglinton Castle
- Eglinton Country Park
- Eglinton Tournament Bridge
- Industry and the Eglinton Castle estate
- Polnoon Castle
- Robert Burns and the Eglinton Estate
- Seagate Castle
- Some authorities spell the title as Earl of Eglintoun (Burke 1832, p. 425).
- "Earl of Eglinton". Debrett's Peerage, Baronetage, Knightage and Companionage. 1878. Retrieved 17 April 2021.
- "Hugh Montgomerie, 1st Earl of Eglinton". The Book of Scotsmen Eminent for Achievements. 1881. Retrieved 17 April 2021.
- "Alexander Montgomerie". Burke's Genealogical and Heraldic History of the Peerage. 1848. Retrieved 17 April 2021.
- Henderson 1894.
- Burke, John (1832). A General and heraldic dictionary of the peerage and baronetage of the British Empire. 1. H. Colburn and R. Bentley.
- Henderson, Thomas Finlayson (1894). Lee, Sidney (ed.). Dictionary of National Biography. 38. London: Smith, Elder & Co. pp. 298–300. (6th Earl) . In
- Chisholm, Hugh, ed. (1911). Encyclopædia Britannica. 9 (11th ed.). Cambridge University Press. pp. 17–18. .
- Chisholm, Hugh, ed. (1911). Encyclopædia Britannica. 24 (11th ed.). Cambridge University Press. p. 703. .
- Henderson, Thomas Finlayson (1894). Lee, Sidney (ed.). Dictionary of National Biography. 38. London: Smith, Elder & Co. p. 2300. (9th Earl) . In