| 17th Avenue AllStars | |
| 36 Madison Ave | - All Male
- College
- Contemporary
|
| 4 Sinfonia | |
| 5-Alone | |
| 54th & City | - All Male
- College
- Contemporary
|
| 5bit | - All Male
- Contemporary
- Professional
|
| 5idelity | |
| 5VOR5 | |
| 6 Minute Warning | - All Male
- Alternative/Experimental
- Beatbox
- Contemporary
- Hip Hop
- Jazz
- Professional
- Rock
- World/Folk
|
| 7/D/W [DISBANDED 2005] | |
| A Cappella Pops | |
| A Cappella Showcase Chorus | |
| A(h!) Capella | |
| Äänipäät | |
| Academy Singers | |
| Acappedia | - Barbershop
- Chant (Medieval/Gregorian)
- Choral/Classical
- Christian
- Contemporary
- Doo-wop
- Mixed
- Renaissance/Madrigals
- World/Folk
|
| Acappology | - All Styles
- College
- Contemporary
- Mixed
|
| Acappuccino | - Choral/Classical
- Contemporary
- Mixed
- World/Folk
|
| Ace Angels | |
| add9 | |
| After Hours | - College
- Contemporary
- Mixed
- Rock
|
| Alabaster Blue | - All Female
- College
- Contemporary
|
| Albahaca | |
| Aliqua | |
| All About Buford [ON HIATUS] | - Contemporary
- Mixed
- Professional
|