1966 NCAA University Division baseball season
The 1966 NCAA University Division baseball season, play of college baseball in the United States organized by the National Collegiate Athletic Association began in the spring of 1966. The season progressed through the regular season and concluded with the 1965 College World Series. The College World Series, held for the twentieth time in 1966, consisted of one team from each of eight geographical districts and was held in Omaha, Nebraska at Johnny Rosenblatt Stadium as a double-elimination tournament. Ohio State claimed the championship.
Season headlines
- March 7 – Tulane's Stephen Martin became the first African American to play a varsity sport in the Southeastern Conference, debuting in the Green Wave's season opener against Spring Hill. In later years, Martin would be overlooked as an SEC integration pioneer because he was a walk-on and Tulane left the SEC immediately after the 1966 season.
Conference winners
| Conference | Regular Season Winner |
| Atlantic Coast Conference | |
| Big Eight Conference | Oklahoma State |
| Big Ten Conference | Ohio State |
| CIBA | |
| EIBL | |
| Mid-American Conference | |
| Pacific Coast Conference | |
| Southeastern Conference | |
| Southern Conference | |
| Southwest Conference | Texas |