Barton was born in Rome, Georgia.[4] Her parents are Jim Barton and Robin Fox. She first performed when she was six years old, singing "Tender Shepherd" from the 1954 musical Peter Pan at a talent show at the Armuchee Elementary School.[5][6]
In July 2008, Barton sang as the Witch in Humperdinck's Hansel and Gretel at the Aspen Music Festival; one critic described Barton's performance as coming "close to stealing the show with her over-the-top witch."[12]
On June 21, 2013, Barton won both the main prize and the song prize at the BBC Cardiff Singer of the World competition.[17] She won the primary competition two days after winning the song prize.[2][18] This made her the second person in the history of the competition to win both prizes, after Romanian tenor Marius Brenciu did so in 2001.[19]
In 2018 she was the vocal soloist for the BBC Last Night of the Proms in the Royal Albert Hall.[citation needed]
The Guardian reviewing the 2013 Cardiff Singer of the World results: "She is a great artist, no question, with an imperturbable steadiness of tone, and a nobility of utterance that invites comparison not so much with her contemporaries as with mid-20th century greats such as Kirsten Flagstad and Karin Branzell...her performance of Unbewegte Laue Luft, marked her out as one of the great Brahms interpreters of our times."[22]
In 2012, Opera News described Barton as a "rising star" with a "sumptuous voice".[23]
In a review of a recital at the Kennedy Center in 2009, Anne Midgette said that Barton had a "big voice" and "sang very well" but "showed [a] penchant for mugging".[24]
In May 2015, Musical Toronto wrote about Barton's singing in Verdi's Requiem with the Toronto Symphony Orchestra: "Jamie Barton’s gleaming mezzo and exemplary legato was such a pleasure – no wonder she took Cardiff! Her Liber Scriptus, Quid sum miser, and Lux Eterna were all amazing. She was not afraid to use chest voice, but it was very musical and without vulgarity."[25]
Dominico Scarlatti – La Dirindina – Ars Lyrica Houston; Brian Shurcliffe (baritone); Jamie Barton (mezzo); Joseph Gaines (tenor). Label: Sono Luminus. Released August 2012.
Peter Ash-The Golden Ticket – Benjamin Wenzelberg (treble); Jamie Barton (mezzo); Jason Hardy (bass); Gerald Thompson (countertenor); Daniel Okulitch (Baritone); Atlanta Opera; Peter Ash (conductor). Label: Albany Records. Released December 2012.
Holiday Harmonies: Songs of Christmas – Jamie Barton (mezzo); Maureen McKay (mezzo); Stacey Shames (harp); Essential Voices USA (chorus). Label: Sono Luminus. Released October 2015.
All Who Wander – Jamie Barton (mezzo); Brian Zeger (piano). Label: Delos Music. Released November 2016.
^Anderson, Eric (November 8, 2006). "Once upon an Opera". Indiana Daily Student. Archived from the original on October 4, 2013. Retrieved January 26, 2013.