| 1975 U.S. Pro Indoor | |
|---|---|
| Date | January 20–26 |
| Edition | 8th |
| Category | World Championship Tennis |
| Draw | 128S / 64D |
| Prize money | $115,000 |
| Surface | Carpet / indoor |
| Location | Philadelphia, PA, U.S. |
| Venue | Spectrum |
| Champions | |
| Singles | |
 Marty Riessen[1] | |
| Doubles | |
Brian Gottfried /  Raúl Ramírez[2] | |
The 1975 U.S. Pro Indoor was a men's WCT tennis tournament played on indoor carpet courts at the Spectrum in Philadelphia, Pennsylvania in the United States. It was the eighth edition of the tournament and was held from January 20 through January 26, 1975. Seventh-seeded Marty Riessen won the singles title.[3]
- ^ "1975 Philadelphia – Singles draw". Association of Tennis Professionals (ATP).
- ^ "1975 Philadelphia – Doubles draw". Association of Tennis Professionals (ATP).
- ^ John Barrett, ed. (1976). World of Tennis '76 : a BP and Commercial Union yearbook. London: Queen Anne Press. pp. 143, 148. ISBN 9780362002768. OCLC 650229036.