| Ubbi Dubbi | Ennis | TX | United States | April | 4th Weekend | 2 Days | Disco, Electronic, House | Music |
| UllrGrass Music Festival | Golden | CO | United States | January | 4th Weekend | 3 Days | Bluegrass, Americana, & roots music | Music |
| Uncle Boojie’s Roots Revue | Louisville | KY | United States | May | Memorial Day Weekend | 2 Days | Bluegrass | Music |
| Uncle Dave Macon Days | Murfreesboro | TN | United States | October | 1st Weekend | 4 Days | Bluegrass | Music |
| Under the Big Sky Fest | Whitefish | MT | United States | July | 2nd Weekend | 3 Days | Country, Folk, Rock | Music |
| Underground Music Showcase (UMS) | Denver | CO | United States | July | 4th Weekend | 3 Days | Indie | Music |
| Upper East Tennessee Fiddler’s Convention | Flag Pond | TN | United States | April | 4th Weekend | 2 Days | Bluegrass | Music |
| Upperco Music Festival | Upperco | MD | United States | September | 3rd Weekend | 5 Days | Bluegrass | Music |
| Utah Arts Festival | Salt Lake City | UT | United States | June | Last Weekend | 3 Days | Vsual arts, performing arts, music, with a stage dedicated to singer-songwriter, folk, and Americana artists. | Music |
