1965–66 NCAA Division I men's ice hockey season

The 1965–66 NCAA University Division men's ice hockey season began in November 1965 and concluded with the 1966 NCAA University Division Men's Ice Hockey Tournament's championship game on March 19, 1966, at the Williams Arena in Minneapolis, Minnesota. This was the 19th season in which an NCAA ice hockey championship was held and is the 72nd year overall where an NCAA school fielded a team.

Minnesota–Duluth joined the WCHA beginning with this season. Pennsylvania promoted their club program to varsity status and began playing as an independent.

Season tournaments
===Standings ===

1966 NCAA Tournament
Note: * denotes overtime period(s)

Player stats
===Scoring leaders === The following players led the league in points at the conclusion of the season.

GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes

Leading goaltenders
The following goaltenders led the league in goals against average at the end of the regular season while playing at least 33% of their team's total minutes.

GP = Games played; Min = Minutes played; W = Wins; L = Losses; OT = Overtime/shootout losses; GA = Goals against; SO = Shutouts; SV% = Save percentage; GAA = Goals against average