Anthony Manahan (ca 1794 – January 21, 1849) was a businessman and political figure in Upper Canada. He was born in County Galway in Ireland around 1794 and went to Trinidad around 1808. In 1820, he moved to Kingston in Upper Canada and began business as a merchant. In 1824, he became manager of the iron works at Marmora which were then owned by Peter McGill; he returned to Kingston in 1831. He became a major in the Hastings militia in 1826 and was made a colonel in 1830. In 1829, he was appointed justice of the peace in the Midland District. In 1836, he was elected to the Legislative Assembly of Upper Canada.