The Old Greenwich Merchants Association (OGMA) is a group of retailers working together to promote a community based retail environment for the village of Old Greenwich. The OGMA meets together to exchange ideas about ways to improve the Old Greenwich shopping district, encourage local shopping and promote goodwill with the community. The organization is organized by local store owners who volunteer their time.

Formerly part of the Greenwich Chamber of Commerce, this independent volunteer group has previously organized street parties, bed races, pumpkin painting, sidewalk sales, and one of the community’s favorite events – First Light.