Louis Alonzo Young (February 19, 1893 – July 19, 1948) was an American football player and coach. He served as the head football coach at the University of Pennsylvania from 1923 to 1929, compiling a record of 49–15–2. Young played college football at Penn from 1912 to 1914, captaining the team in 1913. He died at the age of 56 on July 19, 1948 in Philadelphia.