John Farmer Bell (born April 14, 1962) is the lead singer, rhythm guitarist and occasional mandolin player for the American rock band Widespread Panic.

Bell is an active philanthropist, most notably as an advocate for SMA (spinal muscular atrophy).

Bell has helped raise over $2 million for SMA research, mostly through his involvement with "Hannah's Buddies".

Guest performers at the benefit have included Col. Bruce Hampton, Vic Chesnutt, John Keane, and Bloodkin, as well as Grammy Award winner Robert Randolph and the Family Band and the North Mississippi Allstars, and Nickel and the Polar Bears.

He has also performed at various Habitat for Humanity Christmas Jam benefit concerts put on by Warren Haynes (Allman Brothers Band, Govt Mule) annually in Haynes's hometown of Asheville, NC.