Blackhawk is an unincorporated master planned community and census-designated place located in Contra Costa County, California, east of Danville and Oakland. Governed by county rules/regulations and an HOA, Blackhawk also has an optional 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 is provided by HOA dues. The area is covered by the San Ramon Valley Fire Protection District.The ZIP Code is 94506. The community is inside area code 925. Blackhawk Ranch was established in 1917 by Ansel Mills Easton and his son-in-law William Q. Ward, in an area east of the San Ramon and Sycamore Valleys. The name came from a famous Irish racehorse named Blackhawk that Easton’s family had once owned. The land passed through the hands of several owners, including Raymond Force (the owner of the Caterpillar Tractor Company), the Hawaii-based sugar and pineapple company Castle & Cooke and Howard Peterson (owner of Peterson Tractor).
