Costner has stated that he spent his teenage years in different parts of California as his father's career progressed. He has described this time as a period when he "lost a lot of confidence", having to make new friends often. Costner lived in Ventura, then in Visalia. Costner attended Mt. Whitney High School where he was in the marching band. Costner graduated from Villa Park High School in 1973. He played baseball at Villa Park and was teammates with Dennis Burtt. He earned a BA from California State University, Fullerton (CSUF) in 1978. While at CSUF, he became a brother in the Delta Chi fraternity.
Costner has stated that he spent his teenage years in different parts of California as his father's career progressed. He has described this time as a period when he "lost a lot of confidence", having to make new friends often. Costner lived in Ventura, then in Visalia. Costner attended Mt. Whitney High School where he was in the marching band. Costner graduated from Villa Park High School in 1973. He played baseball at Villa Park and was teammates with Dennis Burtt. He earned a BA from California State University, Fullerton (CSUF) in 1978. While at CSUF he became a brother in the Delta Chi fraternity.