Julien Rose Baker (born September 29, 1995) is an American indie rock singer and guitarist. Her music is noted for its moody quality and confessional lyrical style, as well as frank explorations of topics including Christianity, addiction, mental illness, and human nature. She has received six Grammy Award nominations and three wins as a member of Boygenius.

Born and raised in suburban Memphis, Tennessee, Baker released her debut album Sprained Ankle (2015) while she was a student at Middle Tennessee State University. The album received critical acclaim and appeared on several 2015 year-end lists. Baker subsequently signed to Matador Records and released her second studio album Turn Out the Lights in 2017, to further critical success. Her third album, Little Oblivions (2021), embraced a more full-band sound and became Baker's first top 40 album on the Billboard 200 chart.

In addition to her solo work, Baker is a member of the indie supergroup Boygenius, alongside Phoebe Bridgers and Lucy Dacus. The group's debut eponymous EP was released in October 2018. Boygenius announced their reunion in January 2023, and their debut studio album The Record was released in March. Their newest release, titled The Rest, was released in October 2023. Baker is also in a country duo with Torres, debuting together in 2024.