| Year: | 1984 |
| Gender: | men's |
| Division: | Division II |
| Teams: | 4 |
| Frozenfourarena: | John S. Glas Field House |
| Frozenfourcity: | Bemidji, Minnesota |
| Champions: | Bemidji State Beavers |
| Titlecount: | 1st |
| Champgamecount: | 2nd |
| Champffcount: | 2nd |
| Runnerup: | Merrimack Warriors |
| Gamecount: | 2nd |
| Runnerffcount: | 4th |
| Semifinal1: | Alaska–Fairbanks Nanooks |
| Frozenfourcount: | 1st |
| Semifinal2: | New Hampshire College Penmen |
| Frozenfourcount2: | 1st |
| Coach: | Bob Peters |
| Coachcount: | 1st |
| Mop: | Joel Otto |
| Mopteam: | Bemidji State |
| Attendance: | 8,114 |
The 1984 NCAA Men's Division II Ice Hockey Tournament involved 8 schools playing in single-elimination play to determine the national champion of men's NCAA Division II college ice hockey. A total of 6 games were played, hosted by Bemidji State.
Bemidji State, coached by Bob Peters, won the national title with a 14-4 two-game aggregate victory in the finals over Merrimack.
Joel Otto, of Bemidji State, was named the Most Outstanding Player and Drey Bradley, of Bemidji State, was the high scorer of the tournament with ten points (2 goals, 8 assists).
| East | West | ||||||
|---|---|---|---|---|---|---|---|
| Seed | Team | Record | Last Bid | Seed | Team | Record | Last Bid |
| 1 | New Hampshire College | 18–7–1 | Never | 1 | Bemidji State | 27–0–0 | 1983 |
| 2 | Merrimack | 11–17–0 | 1982 | 2 | Alaska–Fairbanks | 22–5–0 | Never |
Each round were two-game total-goals series played at the tournament host.