The U.S. Men's Clay Court Championships is an annual ATP Tour tennis tournament. Founded in 1910, it has been held in nearly two dozen cities, and since 2001 has been held in Houston, Texas. It currently pays out US$742,350 with the winner receiving US$100,635. It is the only remaining ATP World Tour-level tournament in the United States to be played on clay courts.

A clay court is one of the types of tennis court on which the sport of tennis is played. Clay courts are built on a foundation of crushed stone, brick, shale, and other aggregate, with a thin layer of fine clay particles on top. Clay courts are more common in Continental Europe and Latin America than in North America, Asia-Pacific or Britain. The only Grand Slam tournament that uses clay courts is the French Open.