October 12, 2022
One often-overlooked service that regional agencies offer successfully is providing technical assistance to their member...
The Southern California Association of Governments (SCAG) is the largest Council of Governments (COG) and Metropolitan Planning Organization (MPO) in the country.
Founded in 1965, SCAG is a Joint Powers Authority under California state law, established as an association of local governments and agencies that voluntarily convene as a forum to address regional issues. Under federal law, SCAG is designated as a Metropolitan Planning Organization (MPO) and under state law as a Regional Transportation Planning Agency (RTPA) and a Council of Governments (COG).
The SCAG region encompasses six counties (Imperial, Los Angeles, Orange, Riverside, San Bernardino and Ventura) and 191 cities in an area covering more than 38,000 square miles. The agency develops long-range regional transportation plans, including sustainable communities strategy and growth forecast components, regional transportation improvement programs, regional housing needs allocations and a portion of the South Coast Air Quality management plans.
In addition to the six counties and 191 cities that make up SCAG’s region, there are six County Transportation Commissions that hold the primary responsibility for programming and implementing transportation projects, programs and services in their respective counties. There are also 14 “sub-regions” within the six counties that have varying degrees of responsibilities in the development of planning and programming transportation projects and developing policies.



The governance structure of SCAG is defined in the organization’s bylaws.
1107 9th Street, Ste. 810
Sacramento, CA 95814
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