Robert LeRoy (February 7, 1885 – September 7, 1946) was a tennis player from New York City in the United States who won two medals at the 1904 Summer Olympics in St. Louis.

He won a Silver medal in both the men's singles event and the men's doubles tournament, partnering Alphonzo Bell.

In 1907, he was a singles finalist at the U.S. National Championships, now known as the US Open.

A questionable line call and his opponent suffering from cramps allowed LeRoy to reach the final,[3] where he lost in straight sets to eventual seven times champion William Larned.

In mixed doubles in Cincinnati, he won the title in 1904 with Winona Closterman and reached two other mixed doubles finals (1905 with Helen Homans and 1907 with Marjorie Dodd).