Greendale is a city in Dearborn County, Indiana, United States. The population was 4,520 at the 2010 census.HistoryGreendale was laid out in 1852, but the plat was not recorded until 1883. Greendale likely took its name from Greendale Cemetery.GeographyGreendale is located at .According to the 2010 census, Greendale has a total area of 5.785sqmi, of which 5.71sqmi is land and 0.075sqmi is water.Demographics2010 censusAs of the census of 2010, there were 4,520 people, 1,809 households, and 1,241 families residing in the city. The population density was 791.6PD/sqmi. There were 1,942 housing units at an average density of 340.1/sqmi. The racial makeup of the city was 95.6% White, 1.0% African American, 0.2% Native American, 0.8% Asian, 0.6% from other races, and 1.8% from two or more races. Hispanic or Latino of any race were 1.6% of the population.There were 1,809 households of which 33.1% had children under the age of 18 living with them, 49.9% were married couples living together, 12.8% had a female householder with no husband present, 5.9% had a male householder with no wife present, and 31.4% were non-families. 27.1% of all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.02.