"A Teenager in Love" is a song written by Doc Pomus and partner Mort Shuman. It was originally recorded by Dion and the Belmonts, and released in March 1959. It appeared on their album Presenting Dion and the Belmonts (1959). It reached number 5 on the Billboard pop charts.

The song was covered by many different artists; in 1959, three different versions of the song charted simultaneously in the UK, the other two versions being by Marty Wilde and Craig Douglas, which reached No. 2 and No. 13 respectively on the British chart.