The 1955 NCAA swimming and diving championships were contested in March 1955 at Billings Natatorium at Miami University in Oxford, Ohio at the 19th annual NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving among its member programs in the United States.

[1] Ohio State retained the national title, the Buckeyes' ninth, after finishing thirty-nine points ahead of Michigan and Yale in the team standings.