David Howell Evans (born August 8, 1961, Barking, Essex [now in Greater London], England), byname the Edge, is the guitarist of the Irish rock band U2.

Dave Evans, who was known as a loner in high school, took piano and guitar lessons and often performed with his brother Dik Evans before they both answered an ad posted by Larry Mullen, Jr. seeking musicians to form a rock band. This band would go through several incarnations before emerging as U2 in March 1978 (Dik Evans left the band just before the name change).

Evans is credited with devising a novel rhythm guitar sound, utilising a heavy echo effect synchronised with the beat of the music. This effect would form the signature sound of U2.

In addition to his regular gig playing with U2, Evans has also recorded with artists like Johnny Cash, B. B. King, Tina Turner, and Ron Wood.

Evans married his high school girlfriend Aislinn O'Sullivan . The couple had three daughters together: Hollie, Arun and Blue Angel. Evans and O'Sullivan separated in 1991 but could not divorce because of Irish law. They were divorced in 1996.

In October 1997, Evans had a fourth daughter, Sian, with Morleigh Steinberg , a dancer from U2's early 1990s Zoo TV tour. Their son Levi was born in September 1999. The couple married in June 2002.