The Ontario Cross-Cultural Music Society Choir, OCMS-Choir, was founded by a group of vocal enthusiasts in April 1997 under the direction of the OCMS. This choir has provided excellent vocal training to countless music lovers of all ages by distinguished conductors such as Kwong-ChingWong, Yan-Kwong Tse, ChingMak, Lillian Po Sit, Francis Chung and Shek Ko in the past ten years.

Each year, the choir participates in the annual gala concert of the Overseas Chinese Festival of the Arts and holds regular concerts periodically. During the 10th Anniversary Gala concert 2006, together with the Overseas Chinese Philharmonic Orchestra and other Ontario choirs, these musicians literally brought down the roof of the Toronto Centre for the Arts performing the Yellow River Cantata.  The choir has now expanded to 50 plus members.