Boundaries of 2014 Census Designated Places in San Mateo County. This data includes boundaries for: Atherton, Belmont, Brisbane, Broadmoor, Burlingame, Colma, Daly City, East Palo Alto, El Granada, Emerald Lake Hills, Foster City, Half Moon Bay, Highlands-Baywood Park, Hillsborough, Ladera, La Honda, Loma Mar, Menlo Park, Millbrae, Montara, Moss Beach, North Fair Oaks, Pacifica, Pescadero, Portola Valley, Redwood City, San Bruno, San Carlos, San Mateo, South San Francisco, West Menlo Park, and Woodside.

More information about Census Designated Places can be found on the US Census site: https://www.census.gov/geo/reference/gtc/gtc_place.html