"I Want You Back" is the first national single by the Jackson 5. It was released by Motown on October 6, 1969, and became the first number-one hit for the band on January 31, 1970. It was performed on the band's first television appearances, on October 18, 1969, on Diana Ross's The Hollywood Palace and on their milestone performance on December 14, 1969, on The Ed Sullivan Show.

The song, along with a B-side remake of "Who's Lovin' You" by Smokey Robinson & the Miracles, was the only single to be released from the Jackson 5's first album, Diana Ross Presents The Jackson 5. It went to number one on the Soul singles chart for four weeks and held the number-one position on the Billboard Hot 100 singles chart for the week ending January 31, 1970.

"I Want You Back" was ranked 104 on Rolling Stone's 500 Greatest Songs of All Time.