Roderick Duncan McKenzie (3 February 1885 – 3 May 1940) was a Canadian-American sociologist, who became head of the sociology department at the University of Michigan.

In 1921 he received his Ph.D from Chicago, under Robert E. Park, with a thesis, The Neighborhood: A Study of Local Life in the City of Columbus, Ohio, which was published in 1923.

He was appointed to a position at the University of Washington where he eventually become the chair of the sociology department.

He was the Washington state director for Pacific Coast Survey of Race Relations from 1924 to 1925.

[3] From 1930 until his death in 1940, McKenzie served as head of the Department of Sociology at the University of Michigan.