Andrew Williams (August 27, 1828 – October 6, 1907) was an American politician, manufacturer, merchant and miner from the State of New York.

Born in Ormstown in Lower Canada (in the modern-day Province of Quebec), Williams received a limited schooling as a child and later engaged in mercantile pursuits.

He was one of the organizers of the Iron National Bank in Plattsburgh in 1881 and served as its president from 1881 to 1888.

He was Supervisor of the Town of Dannemora for two years; Supervisor of the Town of Plattsburgh for a number of years; Superintendent of the Plattsburgh Waterworks from 1889 to 1902; and Treasurer of Clinton County from 1891 to 1905.

Williams was a member of the Board of Education until his death in Plattsburgh on October 6, 1907.