1962–63 Washington State Cougars men's basketball team

The 1962–63 Washington State Cougars men's basketball team represented Washington State University for the 1962–63 NCAA college basketball season. Led by fifth-year head coach Marv Harshman, the Cougars were new members of the Athletic Association of Western Universities (AAWU, Big Six) and played their home games on campus at Bohler Gymnasium in Pullman, Washington.

The Cougars were 5–20 overall in the regular season, and dropped both games to rival Washington.

Because they were approved for AAWU membership in June 1962 and formally joined a few weeks later, the schedules for this season were already in place. Washington State did not play any of the four AAWU members from California, so they were effectively an independent for a fourth consecutive year. A full league schedule began the following season.

It was a difficult year, as the Cougars were 1–15 against former Northern Division members of the Pacific Coast Conference: Washington (0–2), Oregon (0–5), Oregon State (0–4), and Palouse neighbor Idaho (1–4).