Jeffrey Brandon Timmons (born: April 30, 1973 in Canton, Ohio) was the founding member of the pop group 98 Degrees, together they've sold over 10 million records and charted no less than 8 top 40 singles. By achieving success with 98 Degrees, he has also demonstrated unique skills as a solo artist. He is divorced and shares custody of his two children, a daughter Alyssa and a son Jeffrey Jr.

Jeff and the other members of 98 Degrees decided to take a break to pursue other avenues, and Jeff launched his solo career by touring with Jim Brickman. After positive reviews, he wrote and arranged his first solo album, Whisper That Way, which was released in August 2004 and included the singles Whisper That Way, Better Days and Favorite Star. Although the latter two singles failed to chart in the US and the album failed to place on the Billboard 200 Albums chart, the track Whisper That Way managed to reach #23 on the Adult Contemporary chart.

Jeff Timmons was the founding member of 98 Degrees. Although they are considered by many as a boy band, they are in fact not a boy band. They formed independently and were later picked up by a label, as opposed to being assembled by the label itself.

The group was originally signed to the Motown label in the mid-1990s. After building popularity with their appearance in the movie Mulan, singing "True to Your Heart," a duet with labelmate Stevie Wonder, their success broke out in late 1998 with their album 98° and Rising, which included the hit singles "The Hardest Thing" and "I Do (Cherish You)". After the first album, 98 Degrees left Motown for its parent company, Universal Records. All four albums released by the group went platinum.

Jeff became a Member of Gigmasters.com, Inc. in June 2006.

Jeff's sophomore solo album is expected in late 2006, after which 98 Degrees is reportedly going to begin work on its next studio album.

He is also scheduled to make a cameo appearence in the indie film Voosha Day where he plays the boyfriend of one of the leading characters.

Jeff Timmons has put to rest all the rumors and myths by stating 98 Degrees did not break up. They came together in 2004 to sing on Nick and Jessica's Christmas Special. In September 2005, 98 Degrees performed at Club Purgatory in Over the Rhine to support bandmate Justin Jeffre in his candidacy for mayor of Cincinnati. He and bandmate Nick Lachey have stated that 98 Degrees will be working on another album after the release of both their upcoming solo albums.