Here are the DII women's swimming and diving programs with the most national championships

Cal State Northridge defeated Vanderbilt for the first DII women’s swimming and diving championship in 1982. The Matadors took a brief hiatus before winning three more titles in a row in becoming one of seven programs to win multiple national titles in the 36 years since.

https://www.ncaa.com/news/swimming-women/article/2019-01-17/here-are-dii-womens-swimming-and-diving-programs-most

NCAA