| Year: | 1990 |
| Conference: | Northeast Conference |
| Gender: | Men's |
| Teams: | 6 |
| Finalarena: | Charles L. Sewall Center |
| Finalcity: | Moon Township, PA |
| Champions: | Robert Morris |
| Titlecount: | 4th |
| Coachcount: | 2nd |
| Mvp: | Alex Blackwell |
| Mvpteam: | Monmouth |
The 1990 Northeast Conference men's basketball tournament was held February 27-March 1, 1990. The tournament featured the top six teams from the 9-team conference. Robert Morris won their second consecutive and fourth overall ECAC Metro/NEC tournament championship, and received the conference's automatic bid to the 1990 NCAA tournament.
The NEC Men’s Basketball Tournament consisted of a six-team playoff format with all games played at the venue of the higher seed. The top two seeds received a bye in the first round.