The 1972 U.S. National Indoor Tennis 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 1972 USLTA Indoor Circuit and was also a Grade B event on the 1972 Grand Prix Circuit. It was the second edition of the tournament and was held from February 13 through February 20, 1972, and played on indoor hard courts. First-seeded national Stan Smith won the singles title and $9,000 first-prize money as well as 50 Grand Prix ranking points.[1] It was his second singles title at the event after 1969.[2]
Stan Smith defeated 
Ilie Năstase 5–7, 6–2, 6–3, 6–4
Andrés Gimeno / Manuel Orantes defeated Juan Gisbert Sr. / Vladimír Zedník 6–4, 6–3