Glenn Franklin Thistlethwaite (March 18, 1885 – October 6, 1956) was an American football, basketball, baseball, and track and field coach.

In 1926, his team won a share of the Big Ten Conference title, only the second in school history, and his tenure sparked a revival in Northwestern football after a post-World War I decline.

From 1934 to 1941, he coached at Richmond, where he oversaw the school's entry into the Southern Conference in 1936.

Born in Franklin, Indiana in 1885, Thistlethwaite died at the age of 71, on October 6, 1956, of a heart attack at a hospital in Richmond, Virginia.

[1] Thistlethwaite was the 15th head football coach at Northwestern University in Evanston, Illinois and held that position for five seasons, from 1922 until 1926.