David Michael Letterman was born April 12, 1947 in Indianapolis, Indiana. He is the son of Harry Joseph Letterman, a florist, and Dorothy Letterman, a Presbyterian church secretary. Letterman has one older sister, Janice, and one younger sister, Gretchen.
Letterman attended the local high school, Broad Ripple High School. He wanted to go on to Indiana University, however, his grades were not high enough. He then decided to attend Ball State University in Muncie, Indiana. At Ball State, Letterman became a member of the Sigma Chi Fraternity. He graduated in 1969 from the Department of Radio and Television. Letterman registered for the draft and passed the physical after college graduation. He was not drafted for service in Vietnam due to receiving a draft lottery number of 352 out of 365.
Letterman’s career in broadcasting began in college as began in campus radio broadcasting. After college, Letterman began as a anchor and weather man for a local television station, were he gained notability for his off-beat on-air personality. He was encouraged to move to Los Angeles to attempt to further his career.