Blackhawk, CA has a population of 9,468 and is the 4,106th largest city in the United States. The population density is 1,632 per sq mi which is 602% higher than the California average and 1701% higher than the national average. The median age in Blackhawk is 50 which is approximately 38% higher than the California average of 36. In Blackhawk, 76% of the population over 15 years of age are married, 75% speak English and 3% speak Spanish. 42% of Blackhawk residents were born in California, 33% were born out of state, 2% were born outside of the United States and 23% were foreign born.