Ross was born in Littleton, Colorado, the fourth of five kids to Mark and Stormie Lynch.
He and his family moved to California in 2007 to allow his brother Riker to pursue a career as an entertainer. After the move, his brother Rocky taught himself how to play the guitar, and taught Ross how to play and Riker to play bass while their sister Rydel began to play the piano. They soon made the band R5 with a friend they met at a dance studio, Ellington Ratliff, who plays the drums. They say Ellington is like family to them. Their band's website is R5rocks.com.
He and his siblings are the cousins of professional dancers, singers and actors Derek Hough and Julianne Hough.
Ross can play piano, drums, guitar, bass, and is learning to play violin. He has danced for the Rage Boyz Crew, a group founded by a dance company in Southern California. He has been on So You Think You Can Dance and has had guest appearances on shows like Moises Rules!, and can even be seen in movies such as Grapple, with Anton Troy. In 2009 he appeared in the Kidz Bop music video for Let It Rock.
Lynch was cast in early 2011 to appear in the pilot for the Disney Channel entitled Austin & Ally, playing the lead male role of Austin Moon, a teenage singer who becomes an overnight sensation after a music video featuring a performance by him is uploaded to the internet. The pilot was later picked up for a full season's production; the show debuted in December 2011, and was renewed for a second season in March 2012.
In early 2012, Lynch began work on the upcoming Disney Channel Original Movie, Teen Beach Musical. He is performing the role of Brady, the male lead in the film, which is directed by Jeffrey Hornaday and is set for release in 2013.
Ross Lynch plays rhythm guitar and is one of the lead vocalists in the band R5, which also consists of his three elder siblings and a friend of theirs, Ellington Ratliff. In 2010, R5 released an EP titled "Ready Set Rock"
consisting of songs written primarily by his brothers Riker and Rocky along with his sister Rydel. In April 2012 R5 announced via the band's website that they had signed a record deal with Hollywood Records and that they are planning for their first club tour in May.
Lynch has also recorded several songs for Austin & Ally. These songs include "Without You" (the theme song for the series), "Double Take", "Break Down the Walls", "A Billion Hits", "Not A Love Song", "It's Me It's You", "Better Together", and "Heard it on the radio". They even created a Shiny Money and Austin Moon "Double Take" Remix. "A Billion Hits" was released as a digital download on February 21, 2012. At some R5 concerts, full songs from Austin & Ally, "Heard It on the Radio", "Double Take," "A Billion Hits," and "Not a Love Song" have been sung by R5 and Ross Lynch.