| Jackpine Jamboree | Birnamwood | WI | United States | September | Bluegrass |
| Jam Cruise | Miami | FL | United States | February | Alternative, Rock, Jam |
| Jekyll Island New Year’s Bluegrass Festival | Jekyll Island | GA | United States | January | Bluegrass |
| Jenny Brook Bluegrass Festival | Tunbridge | VT | United States | June | Bluegrass |
| Jerusalem Ridge Bluegrass Celebration | Rosine | KY | United States | September | Bluegrass |
| JoCo Bluegrass Festival | Selma | NC | United States | September | Bluegrass |
| Joe Val Bluegrass Music Festival | Framingham | MA | United States | February | Bluegrass |
| John Coltrane Jazz & Blues Fest | High Point | NY | United States | September | Blues, Jazz, Latin |
| Joshua Tree Festival Fall | Joshua Tree | CA | United States | October | Jam, Rock |
