99.9% white. As of the 2000 census, there were 7,298 households, out of which 40% had children under the age of 18 living with them, 66% were married couples living together, 7% had a female householder with no husband present, and 25% were non-families. 22% of all households were made up of individuals, and 8% had someone living alone who was 65 years of age or older. The average household size was 2.7 and the average family size was 3.2. 28% of the village's population was under the age of 18, 5% from 18 to 24, 27% from 25 to 44, 28% from 45 to 64, and 12% 65 years of age or older. The median age was 39 years. For every 100 females, there were 92.9 males. For every 100 females age 18 and over, there were 86.9 males. According to a 2007 estimate, the median household income was $106,337, and the median income for a family was $127,474. Males had a median income of $72,320 versus $39,455 for females. The per capita income for the village was $40,426. About 1.9% of families and 3.5% of the population were below the poverty line, including 4.2% of those under age 18 and 4.9% of those age 65 or over. As of the 2010 US Census, there were 20,315 people living in the village. The racial makeup of the village was 90.10% White, 1.23% African American, 0.16% Native American, 5.73% Asian, 0.04% Pacific Islander, 1.05% from other races, and 1.70% from two or more races. Hispanic or Latino of any race were 4.12% of the population. History The land that is now Libertyville was the property of the Illinois River Potawatomi Indians until August 1829, when economic and resource pressures forced the tribe to sell much of their land in northern Illinois to the U.S. government for $12,000 cash, an additional $12,000 in goods, plus an annual delivery of 50 barrels of salt. Pursuant to the treaty, the Potawatomi left their lands by the mid-1830s, and by 1835 the future Libertyville had its first recorded non-indigenous resident, George Vardin. Said to be a "well-educated" English immigrant with a wife and a young daughter, Vardin lived in a cabin located where the Cook Park branch of the Cook Memorial Public Library District stands today. Though he apparently moved on to the west that same year, the settlement that grew up around his