Zachary Stephen Williams (born June 27, 1978) is an American Christian rock singer-songwriter from Bono, Arkansas. From 2007 through 2012 he was lead vocalist and played acoustic guitar and harmonica for Zach Williams & The Reformation. He was also the lead singer of the Christian group Brothers of Grace, renamed as Zach Williams and the Brothers of Grace. In 2016, he went on to a solo career.

Zachary Stephen Williams was born in Pensacola, Florida, on June 27, 1978, but grew up in Jonesboro, Arkansas.

Williams was the lead singer in Zach Williams & The Reformation, an American rock band formed in Jonesboro, Arkansas, in 2007 by the group of Zach Williams (acoustic guitar, harmonica and vocals), Red Dorton (bass guitar and vocals), Robby Rigsbee (slide guitar and rhythm guitar), Josh Copeland (lead guitar, rhythm guitar and vocals) and Evan Wilons (drums). The band took their name from the desire to reform or revitalize the southern rock sound. The band released two independent albums, Electric Revival in 2009 and A Southern Offering in 2011. In 2012, Williams disbanded The Reformation due to his newfound Christian beliefs.

After Zach Williams and The Reformation disbanded, Williams and guitarist Robby Rigsbee dedicated their lives to Christ and began playing music in their church, Central Baptist in Jonesboro, Arkansas. Church band the Brothers of Grace became Zach Williams and the Brothers of Grace. Shaun Kirby, who had previously been part of southern rock band Further Down with Rigsbee, was the drummer. The group also included Bruce Ford (bass) and Kevin Rouse (keyboard). They independently released an EP, Shine a Light, in 2014.

In 2016 Williams signed to Sony Music's Provident Label Group - Essential Records as a solo artist, four years after Zach Williams & The Reformation disbanded, and released his first solo single, "Chain Breaker", which reached No. 1 on the Hot Christian Songs Chart and the Top 10 on Christian radio. Following the single, Williams released a five-song EP, Chain Breaker, with producers Jonathan Smith and Colby Wedgeworth. Williams also led worship at the Refuge Campus of Central Baptist Church in Jonesboro, Arkansas, where he was on staff from 2014 to 2017.

On December 14, 2016, Williams digitally released his full-length album, Chain Breaker, and announced a release date of January 27, 2017, for the CD.

On October 4, 2019, Williams released his second album, Rescue Story. It includes the single "There Was Jesus", with Dolly Parton.

On September 30, 2022, Williams released his third album, A Hundred Highways. It includes the single "Heart of God". His song "Up There, Down Here", from the same album, was covered by contestant Warren Peay on season 21 of American Idol.

• * Was a joint win alongside Ryan Stevenson's "Eye of the Storm".