Monroe City is a town in Harrison Township, Knox County, Indiana, United States.

[4][5] According to the 2010 census, Monroe City has a total area of 0.27 square miles (0.70 km2), all land.

There were 238 housing units at an average density of 881.5 per square mile (340.3/km2).

29.0% of all households were made up of individuals, and 13.8% had someone living alone who was 65 years of age or older.

The racial makeup of the town was 99.27% White, 0.18% African American, and 0.55% from two or more races.

31.2% of all households were made up of individuals, and 16.9% had someone living alone who was 65 years of age or older.