James Mason (August 25, 1843 − July 16, 1918) was a Canadian banker, Senator and military officer. Mason was born in Toronto and educated at private schools and the Toronto Model School where he was head boy. After graduation, he joined the Toronto Savings Bank (later the Home Bank of Canada) ultimately becoming its general manager and president in 1873. He was appointed to the Senate of Canada in 1913 by Prime Minister Robert Borden and sat as a Conservative. Mason retired from the bank and was appointed its honorary president with his son, Harry G. Mason, succeeding him as general manager.