Monroeville is a town in Monroe Township, Allen County, Indiana, United States. The population was 1,235 as of the 2010 census.
Monroeville was platted in 1851. It was named from Monroe Township. A post office was established at Monroeville in 1856.
Monroeville is located at 40°58′22″N 84°52′7″W (40.972799, -84.868598).
According to the 2010 census, Monroeville has a total area of 0.74 square miles (1.92 km2), all land.
As of the census of 2010, there were 1,235 people, 491 households, and 309 families living in the town. The population density was 1,668.9 inhabitants per square mile (644.4/km2). There were 529 housing units at an average density of 714.9 per square mile (276.0/km2). The racial makeup of the town was 98.9% White, 0.1% Pacific Islander, 0.4% from other races, and 0.6% from two or more races. Hispanic or Latino of any race were 1.9% of the population.
There were 491 households, of which 28.9% had children under the age of 18 living with them, 45.8% were married couples living together, 12.4% had a female householder with no husband present, 4.7% had a male householder with no wife present, and 37.1% were non-families.