1989 U.S. Men's Clay Court Championships

The 1989 U.S. Men's Clay Court Championships was a Grand Prix men's tennis tournament held in Charleston, South Carolina in the United States. It was the 21st edition of the tournament and was held from May 8 to May 15, 1989. Sixth-seeded Jay Berger won the singles title.

Singles
🇺🇸 Jay Berger defeated 🇺🇸 Lawson Duncan 6–4, 6–3
 * It was Berger's only title of the year and the 4th of his career.

Doubles
🇸🇪 Mikael Pernfors / 🇸🇪 Tobias Svantesson defeated 🇲🇽 Agustín Moreno / 🇵🇪 Jaime Yzaga 6–4, 4–6, 7–5
 * It was Pernfors's only title of the year and the 3rd of his career. It was Svantesson's 1st title of the year and the 1st of his career.