Henry Albert Austin (February 11, 1833 – June 6, 1911) was a merchant and political figure in New Brunswick. He represented Saint John County in the Legislative Assembly of New Brunswick from 1875 to 1878. He was born in , Queens County, New Brunswick, a descendant of United Empire Loyalists, and was educated in Sackville. In 1876, he married Minnie R. Eaton. He was a director of the St. John Industrial School and also served as a member of the Portland town council.