Albert Louis Hammond Jr. (born Hammond III; April 9, 1980) is an American musician who is a member of the rock band The Strokes. He is best known for his role as rhythm and lead guitarist, as well as occasionally a keyboard player and backing vocalist for the band. Hammond Jr. has released extensive solo work, including five solo albums.

Born in Los Angeles, Hammond Jr. is a first-generation American, his father the songwriter Albert Hammond being of British-Gibraltarian descent, and his mother being of Argentine descent. He attended the same Swiss boarding school as his bandmate Julian Casablancas, where the two became friends. He would move to New York City in 1998 and attended New York University for a year and a half.

Casablancas invited Hammond Jr. to join the Strokes in 1999, being the last member to join the band. He plays rhythm guitar on most songs, and has some songwriting credits on the more instrumental pieces. Hammond Jr. is passionate about fashion and is known for wearing a three-piece suit on tour. Casablancas credits him for influencing the band's style. In 2009, he released a line of men's suits.

In 2006, Hammond Jr. released his debut solo album Yours to Keep. and followed up with ¿Cómo Te Llama? in 2008. Since then, he has released the 2013 EP AHJ, and the albums Momentary Masters, Francis Trouble, and Melodies on Hiatus in 2015, 2018, and 2023 respectively.