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.
<nowiki>*</nowiki>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
<nowiki>*</nowiki>denotes each overtime played
Location: Springfield Civic Center Hosts: American International College and Springfield College
<nowiki>*</nowiki>denotes each overtime played