There have been two baronetcies created for members of the Guinness brewing family, both in the Baronetage of the United Kingdom. As of 2014 both titles are extant.

The Guinness Baronetcy, of Ashford in the County of Galway, is a title in the Baronetage of the United Kingdom. It was created on 15 April 1867 for the brewer, philanthropist and conservative member of parliament Benjamin Guinness. He was a grandson of Arthur Guinness, the founder of the Guinness brewery. His son, the second baronet, was also a businessman and conservative politician and contributed to numerous charitable causes. On 1 May 1880 he was created Baron Ardilaun, of Ashford in the County of Galway, in the Peerage of the United Kingdom.

Lord Ardilaun was childless and the barony became extinct on his death in 1915. However, he was succeeded in the baronetcy by his nephew Sir Algernon, the third baronet, the son of Benjamin Lee Guinness, second son of the first baronet. As of 2014^[update] the title is held by the third baronet's great-nephew, the fifth baronet, who succeeded his father in 2011. He is the grandson of Kenelm Lee Guinness, grandson of the first baronet.

The family seat was Ashford Castle, near Cong, County Galway.

The Guinness Baronetcy, of Castleknock in the County Dublin, was created in the Baronetage of the United Kingdom on 27 May 1885 for Edward Guinness. He was the third son of the first baronet of the 1867 creation. Guinness was later elevated to the peerage as Earl of Iveagh. For more information, see this title. Walter Guinness, 1st Baron Moyne was the third son of the first Earl of Iveagh.