The 1998 U.S. Men's Clay Court Championships was an Association of Tennis Professionals men's tennis tournament held in Orlando, Florida in the United States and played on outdoor clay courts that was part of the World Series of the 1998 ATP Tour.

It was the 30th edition of the tournament and was held from April 20 to April 27, 1998.

Third-seeded Jim Courier won the singles title.

Jim Courier defeated Michael Chang 7–5, 3–6, 7–5 Grant Stafford / Kevin Ullyett defeated Michael Tebbutt / Mikael Tillström 4–6, 6–4, 7–5