California County Boundaries

Overview This feature layer provides county boundary information for California and supports Cal OES planning and operations. It includes county names, California Office of Emergency Services administrative regions, and fire and law mutual aid region assignments for each county. Geographic Coverage The layer covers the state of California and represents county-level boundaries used for statewide emergency management and regional coordination. Use Cases Reference for county-based emergency planning and response coordination Regional organization of counties by Cal OES administrative area Support for fire and law mutual aid planning and operational mapping County boundary visualization in California-focused GIS applications Data Notes The service is maintained by Cal OES and includes boundary-related and regional classification information useful for public safety and preparedness workflows.