Richard Alleyn (April 29, 1835 – August 16, 1883)[1] was an Irish-born lawyer, judge, educator and political figure in Quebec.

He was born in Trabolgan, County Cork, the son of Richard Israël Alleyn and Margaret O'Donovan, and came to Lower Canada with his family in 1838.

He was called to the Lower Canada bar in 1857 and set up a practice at Quebec City with Alexandre Chauveau.

He was married twice: to Louisa Joséphine Lindsay in 1865 and to Catherine-Louise-Josephte, the daughter of Alexandre-René Chaussegros de Léry, in 1877.

His brother Charles Joseph served in the legislative assembly for the Province of Canada and was mayor of Quebec City.