- Bellevue Chamber Chorus
- Boeing Employees Choir
- Cappella Romana
- Cascadian Chorale
- Choir of the Sound
- Choral Arts Northwest
City Cantabile Choir
- Columbia Boys Choir & Girls Choir
- Compline Choir
- Diverse Harmony
- Esoterics
- Everett Chorale
- Issaquah Chorale
- Jet City Chorus
- Kirkland Choral Society
- Northwest Boychoir
- Northwest Chamber Chorus
- Northwest Chorale
- Northwest Girlchoir
- Opus 7 Vocal Ensemble
- PLU Choral Union
- Rainier Chorale
- Sadako Children's Peace Choir
- Saint Mark's Choirs
- Seattle Bach Choir
- Seattle Chamber Singers
- Seattle Children's Chorus
- Seattle Choral Company
- Seattle Girls Choir
- Seattle Labor Chorus
- Seattle Lesbian & Gay Chorus
- Seattle Men's Chorus
- Seattle Peace Chorus
- Seattle Pro Musica
- Seattle Seachordsmen
- Seattle Symphony Chorale
- Sun Hak International Children's Choir
- Total Experience Gospel Choir
- Tudor Choir