Grover Cleveland Dillman (July 18, 1889 – April 14, 1979) was an American engineer and politician who was the President of the Michigan College of Mining and Technology (now known as the Michigan Technological University) from 1933 to 1956. Dillman held several positions in the Michigan state government over a 20-year career as an engineer for the State Highway Department, most notably as the elected state highway commissioner from 1929 to 1933.