As of my last update in October 2023, the most recent NCAA Division I Baseball Championship was won by LSU (Louisiana State University) in 2023. They secured their seventh title by defeating Florida in the championship series. For the latest information, please check the most recent sources, as this may have changed after my last update.
GA Southern
North Carolina, they have won 27.
The University of Michigan has the most with 11 national championships the last in 1997. GO BLUE
UCLA - 100 Championships
UCLA
LSU Men and Women have a combined 64 national championships as of spring 2007. That is, by far, the most by an SEC school.
Arkansas Razorbacks 42 national championships in track
UCLA
In division 1 it's probabilly the university of Washington.
The Alabama Crimson Tide with 14
UCONN
The winners of the GHSA baseball championships in 2011 were: AAAAA - Parkview High School AAAA - Marist HS AAA - Columbus HS AA - Buford HS A - Hebron Christian HS * Parkview also won the State and National Championships (BCA) in 2012 and 2015.