Charles Joseph Alleyn (19 September 1817 – 4 April 1890) was a Quebec lawyer and political figure. He was born in County Cork, Ireland in 1817 and studied at Clongowes Wood College. Alleyn came to Lower Canada with his family around 1837. He was called to the bar in 1840. He supported the annexation movement in Quebec. He served on the city council for Quebec City from 1851 to 1857, serving as mayor in 1854.