Boulder Hill is located in Illinois. Boulder Hill, Illinois has a population of 9,675. Boulder Hill is less family-centric than the surrounding county with 37.15% of the households containing married families with children. The county average for households married with children is 42.61%.
The median household income in Boulder Hill, Illinois is $71,663. The median household income for the surrounding county is $101,816 compared to the national median of $69,021. The median age of people living in Boulder Hill is 35.3 years.
The average high temperature in July is 83.7 degrees, with an average low temperature in January of 14.4 degrees. The average rainfall is approximately 37.7 inches per year, with 28.2 inches of snow per year.
