Dillsboro is a town in Clay Township, Dearborn County, Indiana, United States. The population was 1,327 at the 2010 census.
Dillsboro was laid out in 1830. It was named for James Dill, a general in the War of 1812 and local resident.
The Dillsboro post office, established in 1837, was spelled Dillsborough until 1893.
Dillsboro is located at 39°01′02″N 85°03′32″W.
According to the 2010 census, Dillsboro has a total area of 1 square mile (2.59 km2), all land.
The climate in this area is characterized by hot, humid summers and generally mild to cool winters. According to the Köppen Climate Classification system, Dillsboro has a humid subtropical climate, abbreviated "Cfa" on climate maps.
As of the census of 2010, there were 1,327 people, 520 households, and 320 families living in the town. The population density was 1,327.0 inhabitants per square mile (512.4/km2). There were 580 housing units at an average density of 580.0 per square mile (223.9/km2). The racial makeup of the town was 98.6% White, 0.2% African American, 0.2% Native American, 0.5% Pacific Islander, and 0.7% from two or more races. Hispanic or Latino of any race were 0.2% of the population.
There were 520 households, of which 31.5% had children under the age of 18 living with them, 40.8% were married couples living together, 14.8% had a female householder with no husband present, 6.0% had a male householder with no wife present, and 38.5% were non-families.