Lake in the Hills (often abbreviated L.I.T.H. or LITH) is a village in McHenry County, Illinois, United States. The population was 23,152 at the 2000 census. A 2006 special census put the village’s population at 29,175. As of the 2010 census, the population declined from the 2006 figure to 28,165.
Lake in the Hills is located at 42°11′12″N 88°20′51″W / 42.18667°N 88.34750°W / 42.18667; -88.34750 (42.186729, -88.347429).
According to the 2010 census, Lake in the Hills has a total area of 10.614 square miles (27.49 km), of which 10.38 square miles (26.88 km) (or 97.8%) is land and 0.234 square miles (0.61 km) (or 2.2%) is water.
As of the 2010 Census, there were 28,965 people, 9,544 households, and 7,567 families residing in the village. The population density was 2,809.4 people per square mile (1,084.8/km²). There were 9,885 housing units at an average density of 958.8 per square mile (370.2/km²). The racial makeup of the village was 86.72% White, 2% Black or African American, 0.26% Native American, 5.24% Asian, 0.04% Pacific Islander, 3.62% from other races, and 2.13% from two or more races. Hispanic or Latino of any race were 11.59% of the population.
There were 9,544 households out of which 47.8% had children under the age of 18 living with them, 66.7% were married couples living together, 8.6% had a female householder with no husband present, and 20.7% were non-families. 16% of all households were made up of individuals and 2.7% had someone living alone who was 65 years of age or older. The average household size was 3.03 and the average family size was 3.44.
In the village, the population was spread out with 31.6% under the age of 18, 6.7% from 18 to 24, 33.4% from 25 to 44, 23.2% from 45 to 64, and 5.2% who were 65 years of age or older. The median age was 33.9 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 96.5 males.
For 2015, the median income for a household in the village was $84,300, and the median income for a family was $89,035. Full-time, year-round working males had a median income of $64,725 versus $45,811 for females. The per capita income for the village was $32,957. About 3.9% of families and 5.7% of the population were below the poverty line, including 8.3% of those under age 18 and 2.8% of those age 65 or over.