Greendale is a city in Dearborn County, Indiana, United States. The population was 4,520 at the 2010 census.
Greendale was laid out in 1852, but the plat was not recorded until 1883. Greendale likely took its name from Greendale Cemetery.
Greendale is located at 39°7′17″N 84°51′14″W (39.121438, -84.853937).
According to the 2010 census, Greendale has a total area of 5.785 square miles (14.98 km2), of which 5.71 square miles (14.79 km2) (or 98.7%) is land and 0.075 square miles (0.19 km2) (or 1.3%) is water.
As of the census of 2010, there were 4,520 people, 1,809 households, and 1,241 families living in the city. The population density was 791.6 inhabitants per square mile (305.6/km2). There were 1,942 housing units at an average density of 340.1 per square mile (131.3/km2). 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.