Jonathan Mark Buckland (born 11 September 1977), known as Jon or Jonny Buckland, is the lead guitarist of the band Coldplay.

Buckland was born in London, England, and lived there until the age of four, when his family moved to Pantymwyn, North Wales. He was encouraged to enter the music scene by his elder brother, who was a big fan of My Bloody Valentine. Buckland started playing the guitar at the age of eleven, after being spurred on by The Stone Roses. Buckland attended Alun School in the Welsh town of Mold; moving on to study astronomy and mathematics at University College London, where he also met his future band mates and formed Coldplay.

Buckland's musical influences include Ride, George Harrison and Jimi Hendrix. He is noted for his sparse arrangements and use of slide.

He has been compared with U2's The Edge many times because of his familiar chimming/ringing sound he and The Edge produces (which is evident in Coldplay's single In My Place)

Buckland has guested on Ian McCulloch's solo album Slideling and made a cameo appearance with band mate Chris Martin in the film Shaun of the Dead.

Chris Martin will often refer to him as "Jonny Boy" frequently during live concerts, particularly if Buckland is about to do a solo or a long riff. Chris has famously said: "There would be no Coldplay music without Jonny Buckland.” The affection between Chris Martin and Buckland is often evident during live concerts and interviews, always with tongue firmly in cheek.

He lives in London, England with his long-term girlfriend, jewelry maker Chloe Lee-Evans. Their first baby girl, Violet, was born in November 2007. It has been rumoured that the couple have recently become engaged.