Arthur Ralph Thomas "Doc" Hillebrand (March 9, 1877 – December 14, 1941) was an American football and baseball player and coach. He played college football as a tackle for Princeton University. Hillebrand served was head football coach at the United States Naval Academy from 1901 to 1902 and at his alma mater, Princeton, from 1903 to 1905, compiling a career college football coaching record of 35–15–2. Hillebrand was also the head baseball coach at Navy and Princeton during the same years, tallying a career college baseball coaching mark of 65–31. He was inducted into the College Football Hall of Fame as player in 1970.