The Earldom of Drogheda was created in the Peerage of Ireland in 1661. Other Irish titles held by the Earl include: Viscount Moore (created 1621) and Baron Moore (1616). Furthermore, the Earl is Baron Moore of Cobham in the Peerage of the United Kingdom. That title was created in 1954.

The sixth Earl was created Marquess of Drogheda in 1791 and Baron Moore of Moore Place in the Peerage of the United Kingdom in 1801, but these titles became extinct on the death without heirs of the third Marquess.

Viscounts Moore (1621)

• Gerald Moore, 1st Viscount Moore (d. 1627)
• Charles Moore, 2nd Viscount Moore (1603-1643)
• Henry Moore, 3rd Viscount Moore (d. 1675), created Earl of Drogheda in 1661

Earls of Drogheda (1661)

• Henry Moore, 1st Earl of Drogheda (d. 1675)
• Charles Moore, 2nd Earl of Drogheda (d. 1679)
• Henry Hamilton_Moore, 3rd Earl of Drogheda (d. 1714)
• Henry Moore, 4th Earl of Drogheda (1700-1727)
• Edward Moore, 5th Earl of Drogheda (1701-1758)
• Charles Moore, 1st Marquess of Drogheda (1730-1822)
• Charles Moore, 2nd Marquess of Drogheda (1770_1837)
• Henry Francis Seymour Moore, 3rd Marquess of Drogheda (1825-1892)
• Ponsonby William Moore, 9th Earl of Drogheda (1846_1908), elected a Representative Peer in 1899
• Henry Charles Ponsonby Moore, 10th Earl of Drogheda (1884-1957), elected a Representative Peer in 1913
• Charles Garrett Ponsonby Moore, 11th Earl of Drogheda (1910-1989)
• Henry Dermot Ponsonby Moore, 12th Earl of Drogheda (b. 1937)

This page incorporates information from Leigh Rayment's Peerage Page (http://www.angeltowns.com/town/peerage/)