1976 U.S. National Indoor Open Championships

The 1976 U.S. National Indoor Open Championships was a men's tennis tournament held at the Wicomico Youth and Civic Center in Salisbury, Maryland in the United States. The event was part of the 1976 USLTA-IPA Indoor Circuit. It was the sixth edition of the tournament and was held from February 14 through February 22, 1976, and was played on indoor carpet courts. Second-seeded Ilie Năstase won the singles title and earned $9,000 first-prize money.

Singles
🇷🇴 Ilie Năstase defeated 🇺🇸 Jimmy Connors 6–2, 6–3, 7–6(9–7)
 * It was Năstase's 2nd singles title of the year, and the 55th of his career.

Doubles
🇺🇸 Fred McNair / 🇺🇸 Sherwood Stewart defeated 🇺🇸 Steve Krulevitz / 🇺🇸 Trey Waltke 6–3, 6–2