The 1938 NCAA swimming and diving championships were contested at the College Avenue Gym at Rutgers University in New Brunswick, New Jersey at the 15th annual NCAA-sanctioned swim meet to determine the team and individual national champions of men's collegiate swimming and diving in the United States.

Michigan repeated as national champions, edging rivals Ohio State by one point (46–45) in the team standings. It was the Wolverines' second official national title.

Team results (H) = Hosts (DC) = Defending champions Italics = Debut appearance

Michigan (DC) 46 Ohio State 45 Harvard 36 Princeton 22 Yale 18 Iowa 7 Rutgers (H) 5 Army 4 Stanford Texas Columbia 3 Illinois USC Franklin & Marshall 2 Minnesota 1 Pittsburgh

Individual events Swimming 50-yard freestyle Ed Kirar (DC) Michigan 23.2 100-yard freestyle Ed Kirar (DC) Michigan 52.7 220-yard freestyle William Kendall Harvard 2:12.0 440-yard freestyle William Kendall Harvard 4:48.9 1,500-meter freestyle John Macionis (DC) Yale 20:15.2 150-yard backstroke Al Vande Weghe Princeton 1:34.2 200-yard butterfly Richard R. Hough Princeton 2:23.4 400-yard freestyle relay Waldemar TomskiEdward HutchensTom HaynieEd Kirar Michigan 3:32.7 300-yard medley relay Al Vande WegheRichard R. HoughHendrik Van Oss Princeton 2:54.7

Diving One-meter diving Al Patnik Ohio State 145.14 Three-meter diving Al Patnik Ohio State 143.92

See also List of college swimming and diving teams

References