1975 U.S. National Indoor Tennis Championships

The 1975 U.S. National Indoor Tennis Championships was a men's tennis tournament held at the Wicomico Youth and Civic Center in Salisbury, Maryland. The event was part of the 1975 USLTA-IPA Indoor Circuit. It was the fifth edition of the tournament and was held from February 10 through February 16, 1975, and played on indoor carpet courts. Second-seeded Jimmy Connors won the singles title and earned $9,000 first-prize money.

Singles
🇺🇸 Jimmy Connors defeated 🇺🇸 Vitas Gerulaitis 5–7, 7–5, 6–1, 3–6, 6–0
 * It was Connors' 3rd singles title of the year, and the 35th of his career.

Doubles
🇺🇸 Jimmy Connors / 🇷🇴 Ilie Năstase defeated Jan Kodeš / 🇬🇧 Roger Taylor 7–6, 6–2