| Calico Bluegrass Festival | Yermo | CA | United States | May | Bluegrass |
| California WorldFest | Grass Valley | CA | United States | October | Folk, Jam, Reggae |
| Cameron Bluegrass Festival | Cameron | WI | United States | September | Bluegrass |
| Camp Deep End | Navarro | CA | United States | September | Jam |
| Camp Redwoods | Navarro | CA | United States | August | Jam |
| Camp Springs Bluegrass Festival | Elon | NC | United States | May | Bluegrass |
| Carolina Bible Camp Bluegrass Festival | Mocksville | NC | United States | September | Bluegrass |
| Carolina Country Music Festival | Myrtle Beach | CA | United States | June | Country |
| Carolina Hills Fiddle Fest | Wilkesboro | NC | United States | August | Bluegrass |
| Carter County Shriners Bluegrass Festival | Olive Hill | KY | United States | July | Bluegrass |
| Cascade Equinox Festival | Redmond | OR | United States | September | Bluegrass, Electronic, Jam, Soul |
| CaveFest | Pelham | TN | United States | October | Bluegrass, Americana, Jam |
| Caveman Music Festival | Weston | CO | United States | August | Bluegrass, Country, Folk, Rock |
| Cayamo | Miami | FL | United States | March | Bluegrass, Country, Folk, Indie, Rock |
| CBA South State 48 Bluegrass by the Sea | Carlsbad | CA | United States | November | Americana, Roots, Rock, Blues, Country, and various Americana subgenres. |
| CBA Fall Campout | Lodi | CA | United States | October | Bluegrass |
| CBA Golden Old-time Campout | Guerneville | CA | United States | August | Bluegrass |
| Cedar Springs Bluegrass Gospel Fest | Osage | IA | United States | July | Bluegrass |
| Charleston Beer Festival | Charleston | SC | United States | October | Rock, Jazz, Blues, Country Funk |
| Charleston Bluegrass Festival | Charleston | SC | United States | March | Bluegrass |
| Charlotte Bluegrass Festival | Charlotte | MI | United States | June | Bluegrass |
| Charm City Bluegrass Festival | Baltimore | MD | United States | May | Bluegrass, Americana, folk, and acoustic music |
| Cherokee Bluegrass Festival | Cherokee | NC | United States | June | Bluegrass |
| Cherokee Music Fest | Cherokee | VA | United States | September | Bluegrass |
| Chet Kingery Memorial Bluegrass Festival | Shelbyville | IL | United States | May | Bluegrass |
| Cheyenne Frontier Days | Cheyenne | WY | United States | July | Country |
| Chicago Jazz Festival | Chicago | IL | United States | August | Jazz |
| Christmas in the Smokies | Gatlinburg | TN | United States | November | Bluegrass |
| Cincinnati Music Festival | Cincinnati | OH | United States | July | Pop, R&B |
| Clifftop Appalachian Music Festival | Clifftop | WV | United States | August | Old-time |
| Cline Country Bluegrass Festival | Sonoma | CA | United States | July | Bluegrass |
| CMA Music Festival | Nashville | TN | United States | June | Country |
| Coastal Country Jam | Long Beach | CA | United States | September | Country |
| Coke Ovens Bluegrass Festival | Dunlap | TN | United States | June | Bluegrass |
| Connecticut Sea Music Festival | Essex | MA | United States | June | Americana |
| Corpus Christi Songwriting Festival | Corpus Christi | TX | United States | February | Songwriting |
| Cosmic Songwriters Festival – The Orbit Room | Bloomington | IN | United States | May | Singer-songwriter, Americana, folk, with a focus on intimate performances and artist interaction |
| Country Bay Music Festival | Miami | FL | United States | November | Country |
| Country Boom | West Salem | WI | United States | July | Country |
| Country Calling | Ocean City | MD | United States | October | Country |
| Country Concert | Fort Loramie | OH | United States | July | Country |
| Country Fan Fest | Tooele | UT | United States | July | Country |
| Country Jam Wisconsin | Eau Claire | WI | United States | July | Country |
| Country Thunder Arizona | Florence | AZ | United States | April | Country |
| Country Thunder Florida | Tampa | FL | United States | May | Country |
| Country Thunder Wisconsin | Twin Lakes | WI | United States | July | Country |
| County Bluegrass Festival | Fort Fairfield | ME | United States | August | Bluegrass |
| County Bluegrass Labor Day Festival | Fort Fairfield | ME | United States | September | Bluegrass |
| County Line Country Fest | Prairie du Chien | WI | United States | August | Country |
| Crisfield Bluegrass and Sunset Festival | Crisfield | MD | United States | June | Bluegrass |
| Crook Farm Old-Time Music Festival | Bradford | PA | United States | August | Bluegrass |
| Cyclops Cove | Boca Raton | FL | United States | December | Bass, Electronic |
