Spencer is a town in Washington Township, Owen County, in the U.S. state of Indiana. The population was 2,217 at the 2010 census. It is the county seat of Owen County.
Spencer is part of the Bloomington, Indiana Metropolitan Statistical Area.
Spencer was platted in 1820, and named for Captain Spier Spencer, who fell at the Battle of Tippecanoe, after whom Spencer County is also named. A post office has been in operation at Spencer since 1821.
The Allison-Robinson House, David Enoch Beem House, Owen County Courthouse, Spencer Public Library, and Spencer Town Hall and Fire Station are listed on the National Register of Historic Places.
Downtown events include Christmas at the Square, Spencer Pride Festival, and the Rev20 Christian Music Festival.
According to the 2010 census, Spencer has a total area of 1.26 square miles (3.26 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, Spencer has a humid subtropical climate, abbreviated "Cfa" on climate maps.
As of the census of 2010, there were 2,217 people, 1,008 households, and 554 families living in the town. The population density was 1,759.5 inhabitants per square mile (679.3/km2). There were 1,123 housing units at an average density of 891.3 per square mile (344.1/km2). The racial makeup of the town was 98.1% White, 0.1% African American, 0.2% Native American, 0.5% Asian, 0.2% from other races, and 0.9% from two or more races.