The 1983–84 Oregon State Beavers men's basketball team represented the Oregon State University as a member of the Pacific 10 Conference during the 1983–84 NCAA Division I men's basketball season.
They were led by 14th-year head coach Ralph Miller and played their home games on campus at Gill Coliseum in Corvallis, Oregon.
Oregon State finished the regular season at 22–7 (15–3 Pac-10) and won a share of the conference title with Washington.
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