Avon is a town in Washington Township, Hendricks County, Indiana, United States. The population was 12,446 at the 2010 Census.
As of the 2010 census, there were 12,446 people, 4,457 households, and 3,384 families residing in the town. The population density was 874.0 inhabitants per square mile (337.5/km2). There were 4,742 housing units at an average density of 333.0 per square mile (128.6/km2). The racial makeup of the town was 86.7% White, 5.9% Black, 0.3% Native American, 3.3% Asian, 0.1% Pacific Islander, 1.4% from other races, and 2.2% from two or more races. Hispanic or Latino of any race were 4.3% of the population.
There were 4,457 households of which 45.6% had children under the age of 18 living with them, 62.5% were married couples living together, 9.3% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 24.1% were non-families. 19.4% of all households were made up of individuals and 5.8% had someone living alone who was 65 years of age or older. The average household size was 2.77 and the average family size was 3.20.
The median age in the town was 33.9 years. 30.2% of residents were under the age of 18; 6.6% were between the ages of 18 and 24; 31.7% were from 25 to 44; 23.6% were from 45 to 64; and 8% were 65 years of age or older. The gender makeup of the town was 48.3% male and 51.7% female.