Chesterton is a town in Westchester, Jackson and Liberty townships, Porter County, Indiana, United States. The population was 13,068 at the 2010 census. The three towns of Chesterton, Burns Harbor, and Porter are known as the tri-towns or the Duneland area. There were 4,039 households out of which 36.5% had children under the age of 18 living with them, 57.3% were married couples living together, 9.9% had a female householder with no husband present, and 28.7% were non-families. 23.7% of all households were made up of individuals and 8.3% had someone living alone who was 65 years of age or older. The average household size was 2.57 and the average family size was 3.06.