The 1990 NCAA Division II men's basketball tournament involved 32 schools playing in a single-elimination tournament to determine the national champion of men's NCAA Division II college basketball as a culmination of the 1989-90 NCAA Division II men's basketball season.
It was won by Kentucky Wesleyan College, with Wade Green of runner-up California State University, Bakersfield named the Most Outstanding Player.
*denotes tie Location: NHC Fieldhouse Host: New Hampshire College Location: CSUB Student Activities Center Host: California State University, Bakersfield Location: Hammermill Center Host: Gannon University Location: Joseph G. Echols Memorial Hall Host: Norfolk State University Location: Show Me Center Host: Southeast Missouri State University Location: Owensboro Sportscenter Host: Kentucky Wesleyan College Location: Hyslop Sports Center Host: University of North Dakota Location: Jenkins Field House Host: Florida Southern College *denotes each overtime played Location: Springfield Civic Center Hosts: American International College and Springfield College *denotes each overtime played