Mahlon Morris Garland (May 4, 1856 – November 19, 1920) was an American labor leader and politician who served three terms as a Republican member of the U.S. House of Representatives from Pennsylvania from 1915 to 1920.

He was reelected to a fourth term in Congress, but died in before the session began.

He learned the trade of puddling and heating, and joined the Amalgamated Association of Iron, Steel and Tin Workers, and later became president for the organization.

[1] Garland was elected as a Republican to the Sixty-fourth, Sixty-fifth, and Sixty-sixth Congresses and served until his death.

He had been reelected to the Sixty-seventh Congress, but died in Washington, D.C. on November 19, 1920, before the new session began.