Quartets
| Name | Status | Classification | District | Established Date |
|---|---|---|---|---|
| Coterie | Active | Men | Rocky Mountain | 8/9/19 |
| Counterpoint | Active | Men | Mid-Atlantic | 8/18/18 |
| County 4 | Active | Men | Central States | 7/4/19 |
| Crafted Measures | Active | Men | Ontario | 8/27/18 |
| Cranial Cabbage | Active | Men | Land O Lakes | 7/1/12 |
| Crayons | Active | Men | Land O Lakes | 3/9/17 |
| Cream City Crooners | Active | Men | Land O Lakes | 11/8/10 |
| Crescendo | Active | Men | Seneca Land | 3/2/03 |
| Cross Keys Connection | Active | Men | Mid-Atlantic | 2/25/09 |
| Cross Town Blend | Active | Men | Rocky Mountain | 11/13/18 |
| Crossroads | Active | Men | Central States | 5/14/09 |
| Crosstown Connection | Active | Men | Sunshine | 1/1/16 |
| Crosswind | Active | Men | Northeastern | 10/9/09 |
| Cultofour | Active | Men | Ontario | 9/2/06 |
| Cutting Edge | Active | Men | Far Western | 1/22/19 |
| D'Accord | Active | Men | Northeastern | 6/2/03 |
| D.A.T.E. Nite | Active | Men | Central States | 2/28/15 |
| Da Guys | Active | Men | Sunshine | 8/24/17 |
| Daily Special | Active | Men | Northeastern | 11/16/17 |
| Dakota Blend | Active | Men | Land O Lakes | 3/2/07 |