Sonoma County has a particular interest in coordination of land use, infrastructure, and environmental protection with other local, state, federal, and tribal governmental jurisdictions within the County. GP 2020 is generally compatible with the plans of the nine cities, and with plans or policies established by other governmental agencies. Areas for future expansion of the cities were coordinated with the various cities and with the Local Agency Formation Commission, which is responsible for setting city boundaries and spheres of influence. Although GP 2020 does not regulate development within the cities, it is applicable to lands within their spheres of influence. In some instances, the policies of the plan establish larger "areas of interest" for cities, in order to provide for their review and comment on proposed County actions.
Sonoma County also acknowledges both the presence of federally recognized tribal governments within Sonoma County and the need for communication and coordination with federal and tribal governments, where development of tribal and non-tribal land is proposed and where tribes seek to acquire new trust land.
GP 2020 also considers the policies and concerns of adjacent counties and regional agencies, such as the Association of Bay Area Governments, the Metropolitan Transportation Commission, the San Francisco Bay Conservation and Development Commission, the Bay Area Air Quality Management District, the Northern Sonoma County Air Pollution Control District, the Bay Area Water Quality Control Board, the North Coast Regional Water Quality Control Board, the Sonoma County Water Agency, and others. The text of the various elements notes those situations where these agencies have particular responsibilities that affect the physical development of the County and approval of permits.