Dyer is a town in St. John Township, Lake County, Indiana, United States. The population was 16,517 at the 2020 census. It is a southeastern suburb of Chicago. Geography Dyer borders Munster to the north, unincorporated St. John Township to the south, Schererville to the east, and Lynwood and Sauk Village in Illinois to the west. The Illinois state line comprises Dyer's entire western border. One of Dyer's neighborhoods, Briar Ridge, spans both Dyer and adjacent Schererville. Dyer is roughly 30 miles from downtown Chicago and 12 miles from Chicago's south side. Dyer is built on mostly flat land with an exception being the steep sand ridge south of US Highway 30. This is the Glenwood Shoreline. According to the 2010 census, Dyer has a total area of , all land. Demographics As of 2009, the median income for a household in the town was $76,599 while the mean income for a household in the town was $93,308. The median income for a family was $87,127 and the mean income for a family was $103,563. The estimated per capita income for the town was $34,275. About 0.7% of families and 1.2% of the population were estimated to be below the poverty line. 2010 census As of the census of 2010, there were 16,390 people, 5,985 households, and 4,552 families residing in the town. The population density was . There were 6,125 housing units at an average density of . The racial makeup of the town was 90.1% White, 2.5% African American, 0.2% Native American, 2.9% Asian, 2.4% from other races, and 1.8% from two or more races. Hispanic or Latino of any race were 9.3% of the population. There were 5,985 households, of which 33.5% had children under the age of 18 living with them, 63.8% were married couples living together, 8.4% had a female householder with no husband present, 3.9% had a male householder with no wife present, and 23.9% were non-families. 20.8% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.68 and the average family size was 3.12. The median age in the town was 42.9 years. 23.1% of residents were under the age of 18; 7.1% were between the ages of 18 and 24; 22.9% were from 25 to 44; 31.4% were from 45 to 64; and 15.5%