The 1970 NCAA University Division baseball tournament was played at the end of the 1970 NCAA University Division baseball season to determine the national champion of college baseball. The tournament concluded with eight teams competing in the College World Series, a double-elimination tournament in its twenty-fourth year. Eight regional districts sent representatives to the College World Series with preliminary rounds within each district serving to determine each representative. These events would later become known as regionals. Each district had its own format for selecting teams, resulting in 26 teams participating in the tournament at the conclusion of their regular season, and in some cases, after a conference tournament.^[1] The twenty-fourth tournament's champion was the Southern California, coached by Rod Dedeaux. The Most Outstanding Player was Gene Ammann of Florida State.

The opening rounds of the tournament were played across eight district sites across the country, each consisting of between two and four teams.^[1] The winners of each District advanced to the College World Series.

Bold indicates winner.

• 1970 NCAA College Division baseball tournament
• 1970 NAIA World Series