Bull Valley is a village in McHenry County, Illinois, United States. The population was 726 at the 2000 census. However, at the 2010 census, the population was at 1,077. Surrounded by the suburban sprawl of Crystal Lake, Woodstock, and McHenry, the village prides itself in its rural, low-density character.
Bull Valley is located at 42°18′58″N 88°22′1″W / 42.31611°N 88.36694°W / 42.31611; -88.36694 (42.316132, -88.366815).
According to the 2010 census, Bull Valley has a total area of 8.761 square miles (22.69 km), of which 8.75 square miles (22.66 km) (or 99.87%) is land and 0.011 square miles (0.03 km) (or 0.13%) is water.
At the 2000 census, there were 726 people, 268 households and 217 families residing in the village. The population density was 129.4 per square mile (50.0/km²). There were 281 housing units at an average density of 50.1 per square mile (19.3/km²). The racial makeup of the village was 96.69% White, 0.55% African American, 1.10% Asian, 0.14% Pacific Islander, 0.69% from other races, and 0.83% from two or more races. Hispanic or Latino of any race were 2.20% of the population.
There were 268 households of which 28.7% had children under the age of 18 living with them, 76.9% were married couples living together, 3.4% had a female householder with no husband present, and 19.0% were non-families. 15.3% of all households were made up of individuals and 8.6% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.04.
Age distribution was 25.1% under the age of 18, 4.5% from 18 to 24, 19.3% from 25 to 44, 35.7% from 45 to 64, and 15.4% who were 65 years of age or older. The median age was 46 years. For every 100 females, there were 85.7 males. For every 100 females age 18 and over, there were 88.2 males.
The median household income was $102,693, and the median family income was $109,147. Males had a median income of $73,750 versus $37,188 for females. The per capita income for the village was $54,022. About 1.4% of families and 2.3% of the population were below the poverty line, including 3.1% of those under age 18 and 6.6% of those age 65 or over.