1948 Oregon State Beavers football team

The 1948 Oregon State Beavers football team represented Oregon State University in the Pacific Coast Conference (PCC) during the 1948 college football season. In their 14th season under head coach Lon Stiner, the Beavers compiled a 5–4–3 record (2–3–2 against PCC opponents), finished in sixth place in the PCC, defeated Hawaii in the Pineapple Bowl on New Year's Day, and outscored their opponents, 249 to 236. The team played its home games at Bell Field in Corvallis, Oregon.

On March 7, 1949, Lon Stiner resigned as Oregon State's football coach. He said at the time, "A football coach must have full support in his job. I have had excellent support in the past but when the full support no longer exists, a change is for the best for all parties concerned." With 16 years of service, he was the dean of the PCC football coaches. He compiled a record of 74–49–17 (49–42–13 against PCC opponents) during his tenure as head coach.