Arthur Charles Hardy, PC (December 3, 1872 – March 13, 1962) was a Canadian politician.
Born in Brantford, Ontario, he ran for the Canadian House of Commons in the Ontario riding of Leeds in the 1917 federal election.
Although unsuccessful in that election, he was considered a powerful and influential figure within the Liberal Party.
In 1922, he was called to the Canadian Senate representing the senatorial division of Leeds, Ontario.
A Liberal, he served forty years until his death in 1962. In 1930, he was the Speaker of the Canadian Senate.
He was a graduate of Osgoode Hall Law School, and worked primarily as a lawyer.
He was also an owner of radio station CHML in Hamilton, until the station was sold to Ken Soble in 1942.
In 1938, he was named as a corporate director of Dominion Life.
Hardy was the son of Ontario Premier Arthur Sturgis Hardy.
He married Dorothy Fulford, the daughter of Senator George Taylor Fulford.