Brittany Caroline Haas (born 1987) is an American fiddle player, who also sings and plays the banjo.

[2] She tours with the Haas Marshall Walsh trio, and participates in many international fiddlecamps, including the Ossipee Valley Music Festival.

In June 2023 she was announced as the new fiddle player for Americana band Punch Brothers, replacing founding member Gabe Witcher.

Her sister Natalie Haas plays cello with a similarly diverse group of musicians.

When she was eight years old, her violin teacher gave her some bluegrass sheet music to practice sight reading.