Earl Portarlington is in Earl Ireland.
In 1785 John Dawson 1st Earl Portarlington [aged 40] was created 1st Earl Portarlington. Caroline Stuart Countess Portarlington [aged 22] by marriage Countess Portarlington.
On 25th November 1798 John Dawson 1st Earl Portarlington [aged 54] died. His succeeded son John Dawson 2nd Earl Portarlington [aged 17] succeeded 2nd Earl Portarlington.
On 28th December 1845 John Dawson 2nd Earl Portarlington [aged 64] died unmarried. His succeeded nephew Henry John Reuben Dawson-Damer 3rd Earl of Portarlington [aged 23] succeeded 3rd Earl Portarlington.
On 3rd September 1847 Henry John Reuben Dawson-Damer 3rd Earl of Portarlington [aged 24] and Alexandrina Octavia Maria Vane Countess Portarlington [aged 24] were married. Alexandrina Octavia Maria Vane Countess Portarlington by marriage Countess Portarlington. She the daughter of Charles William Vane 3rd Marquess Londonderry [aged 69] and Frances Vane Tempest Marchioness Londonderry [aged 47].
On 1st March 1889 Henry John Reuben Dawson-Damer 3rd Earl of Portarlington [aged 66] died without issue. His succeeded first cousin Lionel Dawson-Damer 4th Earl of Portarlington [aged 56] succeeded 4th Earl Portarlington. Harriet Lydia Robinson Montagu Countess Portarlington by marriage Countess Portarlington.
On 17th December 1892 Lionel Dawson-Damer 4th Earl of Portarlington [aged 60] died. His succeeded son Lionel Dawson-Damer 5th Earl of Portarlington [aged 34] succeeded 5th Earl Portarlington.
On 31st August 1900 Lionel Dawson-Damer 5th Earl of Portarlington [aged 42] died. His succeeded son Lionel Dawson-Damer 6th Earl of Portarlington [aged 17] succeeded 6th Earl Portarlington.
On 4th July 1959 Lionel Dawson-Damer 6th Earl of Portarlington [aged 75] died. His succeeded grandson George Dawson-Damer 7th Earl of Portarlington [aged 20] succeeded 7th Earl Portarlington.
On 6th October 2024 George Dawson-Damer 7th Earl of Portarlington [aged 86] died. His succeeded son Charles Dawson-Damer 8th Earl of Portarlington [aged 59] succeeded 8th Earl Portarlington.