Mark Allan Hoppus (born March 15, 1972) is an American musician, singer, songwriter, record producer, and television personality best known as the bassist and co-lead vocalist for the pop punk band Blink-182.

Born in Ridgecrest, California, Hoppus spent his childhood moving back and forth between his mother and father's houses, as they divorced when he was in third grade. He became interested in skateboarding and punk rock in junior high, and received a bass guitar from his father at the age of fifteen. After moving to San Diego in 1992, Hoppus' sister introduced him to Tom DeLonge, and together with drummer Scott Raynor, they formed the band Blink-182. Following Raynor and DeLonge's departures from the band in 1998 and 2015, respectively, Hoppus is now the only remaining founding member of Blink-182.

Blink-182 produced several rock recordings and toured exhaustively before signing to major label MCA to co-distribute their sophomore effort, 1997's Dude Ranch, which featured the Hoppus-penned hit "Dammit". After replacing Raynor with Travis Barker, the trio recorded Enema of the State (1999), which launched the band into multiplatinum success, becoming the biggest pop punk act of the era. Two more records followed—the heavier Take Off Your Pants and Jacket (2001) and the more experimental Blink-182 (2003)—before the band split in 2005 following internal tension. Hoppus continued playing with Barker in +44 in the late 2000s. Blink-182 subsequently reunited in 2009 and continue to record and tour worldwide.

Aside from his musical career, Hoppus has had multiple successes behind the recording console, producing records for groups such as Idiot Pilot, New Found Glory, The Matches, Motion City Soundtrack and PAWS. He has previously co-owned two companies, Atticus and Macbeth Footwear, and has begun a clothing line named Hi My Name is Mark. Hoppus hosted a weekly podcast in 2005 through 2006 which returned in 2015, and he hosted his own television talk show, Hoppus on Music, from 2010 to 2012 on Fuse.