John Llewellyn Fenlon (December 7, 1909 – September 2, 2000) was an American college football coach.

He served as the head football coach at the University of Richmond in 1942 and again from 1946 to 1947, compiling a record of 12–15–3.

Fenlon attended George Washington University, where he lettered in football, basketball, and baseball in the early 1930s.

[1] # denotes interim head coach

This biographical article relating to a college football coach first appointed in the 1940s is a stub.