3 Doors Down is an American rock band from Escatawpa, Mississippi, formed in 1996. The band originally consisted of Brad Arnold (lead vocals, drums), Matt Roberts (lead guitar, backing vocals), and Todd Harrell (bass guitar), with Chris Henderson (rhythm guitar) joining in 1998. The band rose to international fame with their 2000 debut single, "Kryptonite", which peaked at number three on the Billboard Hot 100 and led them to sign with Universal Records. It was followed by their debut studio album, The Better Life (2000), which became the 11th-best-selling album of that year and received septuple platinum certification by the Recording Industry Association of America (RIAA). The group was later joined by drummer Richard Liles, who played during the tour for their first album.

Their second album, Away from the Sun (2002) was met with continued success and debuted at number eight on the Billboard 200, also receiving multi-platinum certification by the RIAA and spawning the hit singles "When I'm Gone" and "Here Without You". The band toured extensively for two years, performing at nearly 1,000 worldwide shows following its release. Their third and fourth albums, Seventeen Days (2005) and their self-titled album (2008) both debuted atop the Billboard 200 and received platinum certifications by the Recording Industry Association of America (RIAA). Their fifth album, Time of My Life (2011) peaked at number three, and their sixth most recent album, Us and the Night (2016) peaked at number 14 on the chart.

The band has been primarily described as post-grunge and alternative rock, while occasionally crossing into hard rock and southern rock. Their lyrics often explore themes of angst, rebellion, revenge, yearning, and abandonment. 3 Doors Down has sold 30 million albums worldwide.

Original guitarist Matt Roberts departed in 2012, owing to health issues, before dying in 2016. He was replaced by Chet Roberts, who was formerly Chris Henderson's guitar tech. Harrell was fired from the band in 2013, after being charged with vehicular homicide, and was replaced by bassist Justin Biltonen.