| Date: | March 1–7 |
| Edition: | 2nd |
| Category: | USLTA Indoor circuit |
| Prize Money: | $35,000 |
| Draw: | 32S / 16D |
| Surface: | Carpet / indoor |
| Location: | Hampton, Virginia, United States |
| Venue: | Hampton Roads Coliseum |
| Champs: |  Stan Smith[1] |
| Champd: |  Ilie Năstase / Ion Țiriac[2] |
| After Name: | National Indoor Championships |
| Main Name: | Hampton Grand Prix |
The 1971 National Indoor Championships, also known as the Hampton Indoor, was a men's tennis tournament played on indoor carpet courts at the Hampton Roads Coliseum in Hampton, Virginia in the United States that was part of the 1971 USLTA Indoor Circuit. It was the second edition of the tournament and was held from March 1 through March 7, 1971. First-seeded Ilie Năstase won the singles title and earned $10,000 first-prize money.[3] [4]
See main article: 1971 National Indoor Championships – Singles. Ilie Năstase defeated Clark Graebner 7–5, 6–4, 7–6(5–0)
See main article: 1971 National Indoor Championships – Doubles. Ilie Năstase / Ion Țiriac defeated Clark Graebner / 
Thomaz Koch 6–4, 4–6, 7–5