| Division: | II |
| Year: | 1990 |
| Gender: | Men's |
| Teams: | 32 |
| Finalfourcity: | Springfield, Massachusetts |
| Champions: | Kentucky Wesleyan Panthers |
| Titlecount: | 6th |
| Runnerup: | Cal State Bakersfield Roadrunners |
| Gamecount: | 1st |
| Semifinal1: | North Dakota Fighting Sioux |
| Finalfourcount: | 3rd |
| Semifinal2: | Morehouse Fighting Maroon Tigers |
| Finalfourcount2: | 1st |
| Coach: | Wayne Chapman |
| Coachcount: | 2nd |
| Mop: | Wade Green |
| Mopteam: | Cal State Bakersfield |
| Attendance: | 60,966 |
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.
| School | Outcome | |
|---|---|---|
| Bridgeport | Regional Champion | |
| New Hampshire College | Third Place | |
| New Haven | Fourth Place | |
| St. Anselm | Runner-up | |
| School | Outcome | |
|---|---|---|
| Cal State Bakersfield | Regional Champion | |
| Central Missouri State | Runner-up | |
| Humboldt State | Third Place | |
| UC Riverside | Fourth Place | |
| School | Outcome | |
|---|---|---|
| C.W. Post | Third Place | |
| East Stroudsburg | Runner-up | |
| Gannon | Regional Champion | |
| Slippery Rock | Fourth Place | |
| School | Outcome | |
|---|---|---|
| Florida Tech | Runner-up | |
| Morehouse | Regional Champion | |
| Norfolk State | Third Place | |
| Virginia Union | Fourth Place | |
| School | Outcome | |
|---|---|---|
| Missouri Western State | Runner-up | |
| Southeast Missouri State | Regional Champion | |
| Southern Indiana | Fourth Place | |
| West Texas State | Third Place | |
| School | Outcome | |
|---|---|---|
| Ashland | Runner-up | |
| Ferris State | Third Place | |
| Kentucky Wesleyan | Regional Champion | |
| Southwest Baptist | Fourth Place | |
| School | Outcome | |
|---|---|---|
| Alaska–Anchorage | Fourth Place | |
| Metro State | Runner-up | |
| North Dakota | Regional Champion | |
| South Dakota | Third Place | |
| School | Outcome | |
|---|---|---|
| Florida Southern | Third Place | |
| Jacksonville State | Regional Champion | |
| North Carolina Central | Runner-up | |
| Tampa | Fourth Place | |
*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