The NCAA Division I Baseball Championship is held each year from May through June and features 64 college baseball teams in the United States, culminating in the eight-team Men's College World Series (MCWS) at Charles Schwab Field Omaha in Omaha, Nebraska.

The tournament is unique in that it features four tiers of competition, alternating between double-elimination brackets and best-of-three series.

In fact, throughout the entire 64-team tournament, a team can lose a total of four games and still be crowned champions.

The first round of the tournament, called Regionals, consists of 16 locations that include four teams, seeded 1 through 4, competing in a double-elimination bracket.

The eight Super Regional winners meet in Omaha, Nebraska, in the Men's College World Series.

The winner of this final series wins the MCWS and is crowned the national champion.

The school with the most national champions is USC with 12, though the Trojans have not won one since 1998, and have not appeared in the World Series at all since 2002.

The following table shows the total national championships won by school, as well a map of all champions.

The official NCAA record only includes the District playoff games starting in 1954, so only the top 8 teams from earlier years appear on this table.

The winner of each region moved on to the College World Series, which was now a four-team double-elimination tournament.

Some years included automatic College World Series qualifiers, and that team played no district games; for an example see 1959.

After 61 years at Johnny Rosenblatt Stadium, the College World Series moved to the new TD Ameritrade Park in 2011.

The former was the case for Cal State Fullerton in 1999, as its ballpark lacked the required seating capacity and media facilities at the time.

In 2015, Missouri State was unable to host because of scheduling conflicts with the minor-league team whose off-campus ballpark it used.

Gray Shade and Italics indicates team made the Men's College World Series.

Bold Italics indicates team won the Men's College World Series.

On Saturday, June 12, 2021, 14,385 watched Mississippi State beat Notre Dame 9–8 in game 1 of a best of 3.

For the decisive Monday game, 11,784 fans saw the Bulldogs defeat the Fighting Irish 11–7 to send Mississippi State on to the College World Series.

The highest for an off-campus facility was set at Zephyr Field, a minor-league park in New Orleans.