Viscounts Dillon of Costello Gallen in the Peerage of Ireland (1622)
Comte Dillon in France (1711, from 1737)
Earl of Dillon in the Jacobite Peerage (1721, from 1737)
Viscounts Dillon
- Theobald Dillon, 1st Viscount Dillon (died 1634)
- Lucas Dillon, 2nd Viscount Dillon (1610–1629)
- Theobald Dillon, 3rd Viscount Dillon (1629–1630)
- Thomas Dillon, 4th Viscount Dillon (1615–1672)
- Thomas Dillon, 5th Viscount Dillon (died 1674)
- Lucas Dillon, 6th Viscount Dillon (died 1682)
- Theobald Dillon, 7th Viscount Dillon (died 1691)
- Henry Dillon, 8th Viscount Dillon (died 1713)
- Richard Dillon, 9th Viscount Dillon (1688–1737)
- Charles Dillon, 10th Viscount Dillon (1701–1741)
- Henry Dillon, 11th Viscount Dillon (1705–1787) married Lady Charlotte Lee (d. 1794) daughter and eventual co-heiress of George Henry Lee, 2nd Earl of Lichfield.
Viscounts Dillon (Dillon-Lee)
- Charles Dillon-Lee, 12th Viscount Dillon KP (1745–1813)
- Henry Augustus Dillon-Lee, 13th Viscount Dillon (1777–1832)
- Charles Henry Dillon-Lee, 14th Viscount Dillon (1810–1865)
- Theobald Dominick Geoffrey Dillon-Lee, 15th Viscount Dillon (1811–1879)
- Arthur Edmund Denis Dillon-Lee, 16th Viscount Dillon (1812–1892)
- Harold Arthur Dillon-Lee later Lee-Dillon, 17th Viscount Dillon (1844–1932)
- Arthur Henry Dillon, 18th Viscount Dillon (1875–1934)
- Eric FitzGerald Dillon, 19th Viscount Dillon (1881–1946)
- Michael Eric Dillon, 20th Viscount Dillon (1911–1979)
- Charles Henry Robert Dillon, 21st Viscount Dillon (1945–1982)
- Henry Benedict Charles Dillon, 22nd Viscount Dillon (born 1973)
Comte Dillon in France (1711)
Earl of Dillon in the Jacobite Peerage (1721)
Count Dillon
- The Hon. Arthur Dillon, Count Dillon, 1st Earl of Dillon (1670–1733) second son of 7th Viscount Dillon and father of 10th and 11th Viscount Dillon. Created Count Dillon by King Louis XIV of France . See above
Col James Dillon, Knight of Malta
- Col James Dillon, Knight of Malta (kia. 1745) younger brother of 10th and 11th Viscount Dillon.
Most Rev Arthur Dillon, Archbishop of Toulouse, Archbishop of Narbonne, Commander of the Order of the Holy Ghost, Primate of the Gauls
- Most Rev Arthur Dillon, Bishop of Evreux 1753, Archbishop of Toulouse 1758, Archbishop of Narbonne 1762, Commander of the Order of the Holy Ghost, Primate of the Gauls (1720–1806) younger brother of 10th and 11th Viscount Dillon.
The Hon Arthur Dillon, Count Dillon, Knight of St Louis
- The Hon Arthur Dillon, Count Dillon, Lt Gen in the French service, Knight of St Louis 1780, last Col-Proprietor of the Dillon Regiment (1750–ex.1794) younger brother of 12th Viscount Dillon.
Lords Dillon, Baron of Kilkenny-West in the Peerage of Ireland (1619–1850, dormant 1816-1828)
Earls of Roscommon in the Peerage of Ireland (1622–1850, dormant 1816-1828)
Earls of Roscommon
- James Dillon, 1st Earl of Roscommon (died 1642)
- Robert Dillon, 2nd Earl of Roscommon (died 1642)
- James Dillon, 3rd Earl of Roscommon (c. 1605–1649)
- Wentworth Dillon, 4th Earl of Roscommon (c. 1630–1685)
- Carey Dillon, 5th Earl of Roscommon (1627–1689)
- Robert Dillon, 6th Earl of Roscommon (died 1715)
- Robert Dillon, 7th Earl of Roscommon (died 1721)
- James Dillon, 8th Earl of Roscommon (1702–1746)
- Robert Dillon, 9th Earl of Roscommon (died 1770) never assumed the title. Marshal in the French Army.
- John Dillon, 10th Earl of Roscommon (died 1782)
- Patrick Dillon, 11th Earl of Roscommon (1769–1816) his claim to the Earldom of Roscommon was established by the Irish House of Lords 1799 and then dormant 1816-1828
- Michael James Robert Dillon, 12th Earl of Roscommon (1798–1850)
Barons Clonbrock in the Peerage of Ireland (1790–1926)
Barons Clonbrock
- Robert Dillon, 1st Baron Clonbrock (1754–1795)
- Luke Dillon, 2nd Baron Clonbrock (1780–1826)
- Robert Dillon, 3rd Baron Clonbrock (1807–1893)
- Luke Gerald Dillon, 4th Baron Clonbrock KP (1834–1917)
- Robert Edward Dillon, 5th Baron Clonbrock (1869–1926)
Barons Dillon of the Holy Roman Empire (1783–1982)
Dillon of Lismullen in the Baronetage of the United Kingdom (1801–1982)
Dillon of Lismullen
- Sir John Talbot Dillon, 1st Baronet, 1st Baron Dillon (1739–1805) Barony recognised by King George III per Royal Licence in 1784.
- Sir Charles Drake Dillon, 2nd Baronet, 2nd Baron Dillon (died 1840)
- Sir Arthur Richard Dillon, 3rd Baronet, 3rd Baron Dillon (died 1845)
- Sir William Dillon, 4th Baronet, 4th Baron Dillon (1774–1851)
- Sir Arthur Henry Dillon, 5th Baronet, 5th Baron Dillon (1828–1852)
- Sir John Dillon, 6th Baronet, 6th Baron Dillon (1806–1875)
- Sir John Fox Dillon, 7th Baronet, 7th Baron Dillon (1843–1925)
- Sir Robert Dillon, 8th Baronet, 8th Baron Dillon (1914–1982)