The NCAA Division I men's swimming and diving championships (formerly the NCAA University Division swimming and diving championships) are contested at an annual swim meet hosted by the National Collegiate Athletic Association to determine the individual and team champions of men's collegiate swimming and diving among its Division I members in the United States. It has been held every year since 1924, except 2020.
The meets take place in a 25-yard pool, except for the Division I meets in 2000 and 2004 which were swum in a 25-meter competition course.
Texas have been the most successful program, with 15 national titles.
Arizona State are the reigning national champions, winning their first national title in 2024.
Championship records.
! Event
! style="width:4em" class="unsortable" | Time
! class="unsortable" | 
! Name !! Club!! Date !! Location
! style="width:2em" class="unsortable" | Ref
 ;templatestyles src="Refbegin/styles.css" / ;Legend: # – Record awaiting ratification by NCAA; NR – US record; ;br ; Records not set in finals: h – heat; ;wbr ; sf – semifinal; ;wbr ; r – relay 1st leg; ;wbr ; rh – relay heat 1st leg; ;wbr ; b – B final; ;wbr ; † – en route to final mark; ;wbr ; tt – time trial
References.
 ;templatestyles src="Reflist/styles.css" / ;