The 1990 Volvo U.S. National Indoor (known as such in 1990 for sponsorship reasons) was a tennis tournament played on indoor carpet courts. It was the 20th edition of the event known that year as the Volvo U.S. National Indoor, and was part of the ATP World Series of the 1990 ATP Tour. It took place in Memphis, Tennessee, United States, from February 26 to March 4, 1990.
Michael Stich def. Wally Masur, 6–7(5–7), 6–4, 7–6(7–1)
- It was Stich's first title of the year, and of his career.
Darren Cahill / Mark Kratzmann def. Udo Riglewski / Michael Stich, 7–5, 6–2
- It was Cahill's first title of the year, and the 10th of his career.
- It was Kratzmann's second title of the year, and the 10th of his career.