"R-O-C-K" is a 1956 rock and roll song recorded and co-written by Bill Haley and released as a Decca single.

The song was released as a Decca 45 single, 9-29870, backed with "The Saints Rock 'n Roll" on March 26, 1956, in the U.S.

The song was also released as a single in Australia on Festival Records as FS-919, in Belgium, on Omega as 61.055, in Germany, on Brunswick as 12 065, in Canada, Norway, Ireland, and in Italy on Fonit as 2092.

The Original Comets, credited as The Original Band, featuring Marshall Lytle, Joey Ambrose, Dick Richards, Johnny Grande, and Franny Beecher, recorded the song in 1999 for Rollin' Rock Records and released it on the Still Rockin' Around the Clock CD album.

The recording session was directed by Lalo Schifrin and the band leader was the singer/trombonist Eddie Pequenino.