Wellesley Choral Society
- Mixed choir of 65 singers based in Wellesley Hills. Director, concerts schedule, rehearsal.
- http://wellesleychoralsociety.org/

Spectrum Singers
- Cambridge-based ensemble that performs choral music from the pre-Renaissance through the 20th century, emphasizing seldom-heard works by master composers. Concerts, tickets, auditions, rehearsals, archives.
- http://www.spectrumsingers.org/

Seraphim Singers
- Ensemble based in Boston that performs sacred choral music. Concerts, brochures, members.
- http://www.seraphimsingers.org/

MIT Concert Choir
- A choral group, open by audition to both graduate and undergraduate students, and to members of the MIT community. Auditions, mailing list, members, concert schedule, history.
- http://web.mit.edu/21M401/www/

Mishawum Choral Society
- A regional choral group serving Eastern Massachusetts and based in Woburn. Concert information, tickets, members, membership information.
- http://www.mishawumchoral.org/

Merrimack Valley Chorale
- A community chorus based in Chelmsford, which presents both classical and popular music. Calendar, news and membership information.
- http://www.merrimackvalleychorale.org/

Masterworks Chorale
- A Boston-area ensemble that includes singers from throughout New England. Concert schedule, history, auditions, student chorus, reviews, job opportunities.
- http://www.masterworkschorale.org/

Convivium Musicum
- Boston-based music ensemble specializing in works from the European Renaissance. Concert schedule, musical director, contact information.
- http://www.convivium.org/

The Boston Secession
- A professional vocal ensemble dedicated to making music new. Find concert schedule, previous concerts, mission statement, and membership opportunities.
- http://www.bostonsecession.org/

Neponset Choral Society
- Chorus based in Foxborough, with approximately 80 members covering the southeastern Massachusetts and northern Rhode Island area.
- http://www.ncschorus.org/

Polymnia Choral Society
- 50-member vocal ensemble located in Melrose. Offers schedule, photos and music samples.
- http://www.polymnia.org/

Dedham Choral Society
- A large vocal ensemble and a smaller 50-voice Pops chorus performing locally. Offers schedule and membership information.
- http://www.dedhamchoral.org/

Zamir Chorale of Boston
- Founded in 1969, specializing in music arising out of the various Jewish traditions.
- http://www.zamir.org/

Assabet Valley Mastersingers
- Community-based classical music chorus of approximately 60 singers of all ages, located in Northborough. Offers performance schedule and member and sponsor information.
- http://www.avmsingers.org/