Edgar Welch Leonard (June 19, 1881 – October 7, 1948) was a Harvard graduate and male tennis player from the United States. He is best known for his gold medal at the St. Louis Olympics (1904) in the men's doubles event, with partner Beals Wright. In the men's singles event, he won a bronze medal. Leonard reached the semifinals of the U.S. National Championships in 1904 and the quarterfinals in 1901 and 1906. At the Cincinnati Open in 1904, Leonard was a singles quarterfinalist and a doubles finalist (with Beals Wright).