The 1981 NCAA Men's Water Polo Championship was the 13th annual NCAA Men's Water Polo Championship to determine the national champion of NCAA men's college water polo.

Tournament matches were played at the Belmont Plaza Pool in Long Beach, California during December 1981.

[1] Stanford defeated Long Beach State in the final, 17–6, to win their fourth, and second consecutive, national title.

An All-Tournament Team, consisting of seven players, was also named.

A total of 8 teams were invited to contest this championship.