Keith was born in Clinton, Oklahoma, to Carolyn Joan (nee Ross) and Hubert K. Covel, Jr. and is of English ancestry. He has a sister and a brother. The family lived in Fort Smith, Arkansas, for a few years when Keith was in grade school, but moved to Moore, Oklahoma (a suburb of Oklahoma City) when he was still young. Before the family moved to Moore, he visited his grandmother in Fort Smith during the summers.

In 2002, he released the Unleashed album which included four singles. First was "Courtesy of the Red, White, & Blue (The Angry American)", which Keith wrote in 20 minutes as a response to the September 11, 2001 attacks. The song references Keith's father, a United States Army veteran who died that March in a car accident. Both this song and "Who's Your Daddy?" were number 1 hits, with "Rock You Baby" reaching number 13. The last single was "Beer for My Horses", a duet with Willie Nelson which six weeks at the top of the country charts. At the time, it was also Keith's highest entry on the Hot 100, at number 22. In July 2003, Keith made a guest appearance on Scotty Emerick's debut single "I Can't Take You Anywhere", which was previously recorded by Keith on Pull My Chain. Emerick's version of the song was his only top 40 country hit, at number 27. Shock'n Y'all, his eighth studio album, was released in November 2003. The album's title is a pun on the military term "shock and awe". It became his second album from which all singles went to number 1: "I Love This Bar", "American Soldier", and "Whiskey Girl". Also included on the disc were "The Taliban Song" and "Weed with Willie", two live songs recorded with Emerick. The album was followed in late 2004 by Greatest Hits 2, which included three new songs: "Stays in Mexico", "Go with Her", and a cover of Inez and Charlie Foxx's "Mockingbird", recorded as a duet with his daughter, Krystal Keith. "Stays in Mexico" was a number 3 hit on the country charts, while "Mockingbird" peaked at number 27. Keith's final DreamWorks album was Honkytonk University in early 2005. Lead-off single "Honkytonk U" peaked at number 8, followed by "As Good as I Once Was", which spent six weeks at number 1, and "Big Blue Note" at number 5. After the release of the latter, DreamWorks Records ceased operations.

was there another?
Both this song and "Who's Your Daddy?" were number 1 hits, with "Rock You Baby" reaching number 13.