1955 Oregon State Beavers football team

The 1955 Oregon State Beavers football team represented Oregon State University in the Pacific Coast Conference (PCC) during the 1955 college football season. In their first season under head coach Tommy Prothro, the Beavers compiled a 6–3 record (5–2 against PCC opponents), finished in second place in the PCC, and outscored their opponents, 126 to 120. The team played its home games at Parker Stadium in Corvallis, Oregon.

On February 1, 1955, Tommy Prothro was hired as Oregon State's head football coach. Prothro had been an assistant coach under Red Sanders at UCLA from 1949 to 1954 and at Vanderbilt from 1946 to 1948. Prothro remained at Oregon State for 10 seasons, compiling a record of 63–37–2 (25–9–1 against PCC opponents).