The San Marcos Chamber of Commerce is a private, voluntary, non-profit - 501(c)(6) - business organization dedicated to improving the economic environment of a community and fostering the development of business growth and prosperity. Today's chamber of commerce focuses its efforts on four major areas:

- Economic development
- Community development
- Public policy
- Membership services

This corporation of voluntary membership invests time and money to carry forward programs that are relevant to members' needs and which affect the orderly growth and development of the community.

It is the catalytic agency that brings together all of the forces, both public and private, through which common goals can be resolved.

The mission of the San Marcos Chamber of Commerce is to create and promote a climate where business can operate in a productive and profitable manner.