Blackhawk is an unincorporated planned community and census-designated place located in Contra Costa County, California, United States, east of Danville and Oakland. Governed by county rules/regulations and a homeowner association (HOA), Blackhawk has a country club, two golf courses, sports complex, restaurants, and the adjacent Blackhawk Plaza. 24-hour security plus additional law enforcement contracted through the Contra Costa County Sheriff’s Office is provided by HOA dues. The area is covered by the San Ramon Valley Fire Protection District. Blackhawk is known for its uniform architecture and suburban lifestyle.