Member Agencies & Partners


SCAG’s planning and policy initiatives involve close collaboration with members and partner organizations at the federal, state and local levels. SCAG’s partners help SCAG work more efficiently to enhance quality of life in the region. 



As the largest metropolitan planning organization in the nation SCAG takes very seriously its role as liaison among city and county elected officials, urban planners and community organizations.  SCAG provides members with a peer network to share experiences and work collaboratively on addressing common regional challenges.  For more information, visit our Membership Benefits page.


Policy Committees

SCAG’s policy-making process is guided by the work of three Policy Committees: Transportation; Community, Economic & Human Development; and Energy & Environment. Legislative and communications matters are reviewed by the Legislative/Communications & Membership Committee. SCAG’s operations are managed by the Executive/Administration Committee. Members of the Regional Council serve on one of three Policy Committees for two-year terms and may serve on the Legislative/Communications & Membership Committee. Learn more about SCAG’s Policy Committees.



A total of 15 subregions represent portions of Southern California with shared interests, issues and geography. Subregions play an important role as a conduit between SCAG and the cities and counties of the region by participating and providing input on SCAG’s planning activities. This involvement helps the Regional Council and its committees make better-informed decisions.

Imperial County

Los Angeles County

Orange County

Riverside County

San Bernardino County

Ventura County

Tribal Reservations In the Scag Region

Tribal Governments

In addition to the six counties of Imperial, Los Angeles, Orange, Riverside, San Bernardino and Ventura, the SCAG region includes 16 federally recognized Tribal Governments, which are integral contributors to Southern California’s economy, culture and prosperity. 

SCAG is committed to the strategic goal of including tribal nations in the regional planning and transportation investment process. 

Federally Recognized Tribal Governments In The SCAG Region

Imperial County

Riverside County

San Bernardino County

*River Tribes 

Membership for Tribal Governments

SCAG undertakes a number of planning and policy initiatives to encourage a sustainable region, including developing long-range regional transportation and land use plans. As a member-driven organization, SCAG prides itself on providing tools to support members’ individual work. SCAG offers many resources and tools to empower our local jurisdictions, including tribal governments.

Learn more about the benefits of becoming a member here: Tribal Membership Factsheet


For organizations interested in membership/tribal government relations, contact: 

David C. Salgado
Senior Government Affairs Officer