Monroe City is a town in Harrison Township, Knox County, Indiana, United States. The population was 545 at the 2010 census. Monroe City was named for one of its founders, Monroe Alton. Geography Monroe City is located at (38.615891, -87.355232). According to the 2010 census, Monroe City has a total area of , all land. Demographics 2010 census As of the census of 2010, there were 545 people, 217 households, and 153 families living in the town. The population density was . There were 238 housing units at an average density of . The racial makeup of the town was 98.7% White, 0.6% African American, 0.2% Native American, and 0.6% from other races. Hispanic or Latino of any race were 0.7% of the population. There were 217 households, of which 37.8% had children under the age of 18 living with them, 53.0% were married couples living together, 14.3% had a female householder with no husband present, 3.2% had a male householder with no wife present, and 29.5% were non-families. 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 average household size was 2.51 and the average family size was 3.08. The median age in the town was 32.8 years. 28.8% of residents were under the age of 18; 8.2% were between the ages of 18 and 24; 29% were from 25 to 44; 20.7% were from 45 to 64; and 13.2% were 65 years of age or older. The gender makeup of the town was 47.3% male and 52.7% female. 2000 census As of the census of 2000, there were 548 people, 231 households, and 157 families living in the town. The population density was . There were 259 housing units at an average density of . The racial makeup of the town was 99.27% White, 0.18% African American, and 0.55% from two or more races. Hispanic or Latino of any race were 0.36% of the population. There were 231 households, out of which 32.9% had children under the age of 18 living with them, 53.7% were married couples living together, 11.3% had a female householder with no husband present, and 32.0% were non-families. 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. The average household size was 2.36 and the