Robert Jens Rock (born April 19, 1954) is a Canadian record producer, recording engineer and musician.

In 1976, Rock joined Little Mountain Sound Studios, starting out as a recording engineer and sound mixer. During his time there, he collaborated with producer Bruce Fairbairn, engineering and mixing several influential rock albums, including Loverboy's Get Lucky (1981), Bon Jovi's Slippery When Wet (1986), and Aerosmith's Permanent Vacation (1987).

Rock and singer-songwriter Paul Hyde formed the band Payola$ in 1978. Payola$ were best known for the single "Eyes of a Stranger", from their 1982 album No Stranger to Danger, an album that won the band four Juno Awards. The pair also recorded together in 1987 under the name Rock and Hyde. In 1991, Rock released an album with the band Rockhead.

Some of Rock's most notable works as a producer include the rock albums Dr. Feelgood by Mötley Crüe (1989), the Cult's Sonic Temple (1989), and Metallica's 1991 self-titled album, often referred to as the Black Album. Each of these albums is the top-selling record for its respective band, and Metallica and the Cult each went on to collaborate with Rock on four subsequent albums.

Rock has received twenty-seven Juno Award nominations across various categories. In addition to the four Juno Awards he won for his work with Payola$, he won the Recording Engineer of the Year in 1982, and won the Producer of the Year award in 2000, 2005, and 2010. He was inducted into the Canadian Music Hall of Fame in 2007 and won a Grammy Award for Best Traditional Pop Vocal Album for his work on Michael Bublé's album To Be Loved at the 56th Annual Grammy Awards held in 2014.