Black Diamond is located in Washington. Black Diamond, Washington has a population of 4,378. Black Diamond is less family-centric than the surrounding county with 29.38% of the households containing married families with children. The county average for households married with children is 35.76%.
The median household income in Black Diamond, Washington is $75,880. The median household income for the surrounding county is $83,571 compared to the national median of $57,652. The median age of people living in Black Diamond is 40.5 years.
The average high temperature in July is 75.7 degrees, with an average low temperature in January of 33.4 degrees. The average rainfall is approximately 55.3 inches per year, with 3.8 inches of snow per year.
