- Craft Contemporary
- Candytopia
- Carolinas Aviation Museum
- Carrière Wellington
- Castle Air Museum
- Cabrillo National Monument
- Craigville Beach Inn
- Chimanimani National Park
- Capitol Reef National Park
- Crater Lake National Park
- Cades Cove
- Clingmans Dome
- Cape Fear Botanical Garden
- Cornell Botanic Gardens
- Chanticleer Garden
- Conservation Garden Park
- Cheyenne Botanic Gardens
- Cologne Cathedral
- Chihuahuan Desert
- Camp Tiny Paws
- Cofo Horror
- Cincinnati Comic Expo
- Chicago Steampunk Exposition
- Costume-Con
- Castle Point Anime Convention
- Comic Con Revolution Ontario
- CoreCon
- Crypticon Kansas City
- ConnectiCon
- Cold Iron Conventions
- CincyCon 2021
- ConQuest SAC
- Celesticon
- ConDor Con
- California Extreme
- Central Florida International Auto Show
- Chicago Shoe Market
- ClickCon
- Chicago Build
- Cotrunkage
- CourierWare
- Custom Hide
- Casa Verde
- Claire Chase
- Carmel Symphony Orchestra
- Central Iowa Symphony
- Chamber Orchestra of New York
- Charlotte Symphony Orchestra
- Chattanooga Symphony & Opera
- Charleston Symphony
- Champaign-Urbana Symphony Orchestra
- Colorado Springs Philharmonic
- Corpu Christi Symphony Orchestra
- Columbia Orchestra
- Cheyenne Symphony Orchestra
- Columbus Symphony Orchestra
- Canton Symphony Orchestra
- Chippewa Valley Symphony Orchestra
- Central Wisconsin Symphony Orchestra
- Chicago Youth Symphony Orchestras
- Canadian Children's Opera Company
- Calgary Opera
- Central City Opera
- Chicago Opera Theater
- Cincinnati Opera
- Cherry Creek Arts Festival
- Coconut Grove Art Festival
- CAAMFest
- California Strawberry Festival
- Coconut Grove Pumpkin Patch Festival
- Chowgirls at Solar Arts
- Citadel Houston
- Cheat Codes
- Cash Cash
- Clams Casino
- Chris Lake
- Casey Veggies
- Claude VonStroke
- Champagne Drip
- Christopher Willits