Jamie Reynolds (born Jamie Oliver Jack Reynolds in 1980 in Bournemouth, England) is co-vocalist and bass guitarist of London-based band Klaxons.

Jamie formed the band, initially known as Klaxons (Not Centaurs), when he approached Finnegan Kid to accompany him to play drums early one November morning and then later went on to recruit Simon Taylor, a housemate of a former girlfriend of his.

Jamie grew up near Bournemouth, spent his early 20s in Southampton, and was active in many bands from his early teens, most notably Thermal and Sweet Sweet Cheree. He dropped out of studying Philosophy at the University of Greenwich, instead working in a succession of record shops. On being made redundant he spent his redundancy money on creating a studio rehearsal space with Angular Recording Corporation founder Joe Daniel.

He was voted #13 on NMEs annual cool list, and is currently dating Lou Hayter who plays keyboard in British band New Young Pony Club.

On 21st July 2007 Reynolds broke his leg after attempting to stage dive over 12 feet of grass into the crowd at a show in Angoulême, France as part of the Garden Nef Festival. This led Klaxons to reschedule several Australian shows. However, Klaxons tour of festivals will continue with stand in bass player from The Violets, Joe Daniel who Klaxons descibe as "The Godfather of New Rave". This is the most recent in a series of injuries and mishaps to befall Reynolds that have affected the band's schedule: a bout of pneumonia earlier in the year forced the band to cancel a gig in Portugual, while a broken finger and bruised ribs following an attack in late 2006 in London led to several gigs being rescheduled.