James Mason (August 25, 1843 − July 16, 1918) was a Canadian banker, Senator and military officer.

[1][2] He was appointed to the Senate of Canada in 1913 by Prime Minister Robert Borden and sat as a Conservative.

[2] The Home Bank collapsed in the early 1920s in part due to questionable practices it had engaged in beginning under Mason's tenure.

Around the turn of the century, he was put in command of the 4th Infantry Brigade and retired with the rank of colonel in 1910.

[2] The South African War Memorial on Toronto's University Avenue was built largely through his efforts.