The 1965 Washington State Cougars baseball team represented the Washington State University in the 1965 NCAA University Division baseball season. The Cougars played their home games at Bailey Field. The team was coached by Chuck Brayton in his 4th year as head coach at Washington State.
The Cougars won the District VIII to advance to the College World Series, where they were defeated by the Ohio State Buckeyes.
Roster
Schedule
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! style="" | Regular season
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|-
! bgcolor="#DDDDFF" width="3%" | #
! bgcolor="#DDDDFF" width="7%" | Date
! bgcolor="#DDDDFF" width="14%" | Opponent
! bgcolor="#DDDDFF" width="25%" | Site/stadium
! bgcolor="#DDDDFF" width="5%" | Score
! bgcolor="#DDDDFF" width="5%" | Overall record
! bgcolor="#DDDDFF" width="5%" | PCC record
|- align="center" bgcolor="#ccffcc" | 1 || March 25 || at || Harris Field • Lewiston, Idaho || 17–1 || 1–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 2 || March 26 || vs || Harris Field • Lewiston, Idaho || 10–0 || 2–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 3 || March 26 || vs || Harris Field • Lewiston, Idaho || 3–2 || 3–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 4 || March 27 || vs || Harris Field • Lewiston, Idaho || 13–1 || 4–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 5 || March 27 || vs || Harris Field • Lewiston, Idaho || 5–3 || 5–0 || 0–0 |-
|-
! bgcolor="#DDDDFF" width="3%" | #
! bgcolor="#DDDDFF" width="7%" | Date
! bgcolor="#DDDDFF" width="14%" | Opponent
! bgcolor="#DDDDFF" width="25%" | Site/stadium
! bgcolor="#DDDDFF" width="5%" | Score
! bgcolor="#DDDDFF" width="5%" | Overall record
! bgcolor="#DDDDFF" width="5%" | AAWU record
|- align="center" bgcolor="#ccffcc" | 6 || April 2 || at Yakima || Parker Field • Yakima, Washington || 12–4 || 6–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 7 || April 2 || at Yakima || Parker Field • Pullman, Washington || 6–0 || 7–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 8 || April 5 || at || Unknown • Reno, Nevada || 9–4 || 8–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 9 || April 6 || at Nevada || Unknown • Reno, Nevada || 7–3 || 9–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 10 || April 10 || at || John Smith Field • Sacramento, California || 6–5 || 10–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 11 || April 10 || at Sacramento State || John Smith Field • Sacramento, California || 5–0 || 11–0 || 0–0 |- align="center" bgcolor="#ccffcc" | 12 || April 13 || at || Mulligan Field • Spokane, Washington || 7–1 || 12–0 || 0–0 |- align="center" bgcolor="#ffcccc" | 13 || April 13 || at Gonzaga || Mulligan Field • Spokane, Washington || 0–1 || 12–1 || 0–0 |- align="center" bgcolor="#ccffcc" | 14 || April 16 || || Bailey Field • Pullman, Washington || 7–0 || 13–1 || 1–0 |- align="center" bgcolor="#ccffcc" | 15 || April 17 || Washington || Bailey Field • Pullman, Washington || 5–0 || 14–1 || 2–0 |- align="center" bgcolor="#ccffcc" | 16 || April 17 || Washington || Bailey Field • Pullman, Washington || 4–3 || 15–1 || 3–0 |- align="center" bgcolor="#ccffcc" | 17 || April 21 || at || MacLean Field • Moscow, Idaho || 5–0 || 16–1 || 3–0 |- align="center" bgcolor="#ffcccc" | 18 || April 23 || || Bailey Field • Pullman, Washington || 4–5 || 16–2 || 3–1 |- align="center" bgcolor="#ccffcc" | 19 || April 24 || Oregon State || Bailey Field • Pullman, Washington || 3–0 || 17–2 || 4–1 |- align="center" bgcolor="#ccffcc" | 20 || April 24 || Oregon State || Bailey Field • Pullman, Washington || 3–2 || 18–2 || 5–1 |- align="center" bgcolor="#ccffcc" | 21 || April 27 || Oregon State || Bailey Field • Pullman, Washington || 16–1 || 19–2 || 5–1 |- align="center" bgcolor="#ffcccc" | 22 || April 30 || at || Howe Field • Eugene, Oregon || 1–5 || 19–3 || 5–2 |-