Austin Stowell was born and raised in Kensington, Connecticut, by his father, Robert, a retired steelworker, and his mother, Elizabeth, a schoolteacher. He graduated from Berlin High School in 2003. Upon acceptance at the University of Connecticut in Storrs, Connecticut, he studied with the Department of Dramatic Arts, a division of the School of Fine Arts. He performed in several productions with the Connecticut Repertory Theatre, including Julius Caesar, It Can't Happen Here, and As You Like It. Stowell graduated with a Bachelor of Fine Arts in 2007.