1966 NCAA University Division baseball tournament
The 1966 NCAA University Division baseball tournament was played at the end of the 1966 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 twentieth 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 29 teams participating in the tournament at the conclusion of their regular season, and in some cases, after a conference tournament. The twentieth tournament's champion was [1966 Ohio State Buckeyes baseball|Ohio State Buckeyes baseball team|Ohio State], coached by Marty Karow. The Most Outstanding Player was Steve Arlin of Ohio State.
Tournament
The opening rounds of the tournament were played across eight district sites across the country, each consisting of between two and four teams. The winners of each District advanced to the College World Series.Bold indicates winner.
District 7 at [Tucson, AZ]
Preliminary rounds at Greeley, CO and Laramie, WY.College World Series
Results
Bracket
Game results
| Date | Game | Winner | Score | Loser | Notes |
| June 13 | Game 1 | [1966 Texas Longhorns baseball|Texas Longhorns baseball team|Texas] | 5–1 | [1966 Arizona Wildcats baseball|Arizona Wildcats baseball team|Arizona] | |
| June 13 | Game 2 | 5–3 | |||
| June 13 | Game 3 | Southern California | 6–2 | [1966 1966 North Carolina Tar Heels baseball team|North Carolina Tar Heels baseball team|North Carolina] | |
| June 13 | Game 4 | Ohio State | 4–2 | Oklahoma State | |
| June 14 | Game 5 | Arizona | 8–1 | Northeastern eliminated | |
| June 14 | Game 6 | Oklahoma State | 5–1 | North Carolina | North Carolina eliminated |
| June 14 | Game 7 | 2–0 | Texas | ||
| June 14 | Game 8 | Ohio State | 6–2 | Southern California | |
| June 15 | Game 9 | Southern California | 8–4 | Arizona | Arizona eliminated |
| June 15 | Game 10 | Oklahoma State | 6–1 | Texas | Texas eliminated |
| June 15 | Game 11 | Ohio State | 8–7 | ||
| June 16 | Game 12 | Southern California | 5–1 | Ohio State | |
| June 17 | Game 13 | Oklahoma State | 6–1 | St. John's eliminated | |
| June 17 | Game 14 | Ohio State | 1–0 | Southern California | Southern California eliminated |
| June 18 | Final | Ohio State | 8–2 | Oklahoma State | Ohio State wins CWS |
All-Tournament Team
The following players were members of the All-Tournament Team.| Position | Player | School |
| P | Steve Arlin | Ohio State |
| P | John Stewart | USC |
| C | Chuck Brinkman | Ohio State |
| 1B | Russ Nagelson | Ohio State |
| 2B | Matt Galante | |
| 3B | Bob Toney | Oklahoma State |
| SS | Joe Russo | |
| OF | Bo Rein | Ohio State |
| OF | Ray Shoup | Ohio State |
| OF | Wayne Weatherly | Oklahoma State |