Milan is located at the intersection of Missouri routes 5 and 6. Locust Creek flows past the west side of the city and the Locust Creek Conservation Area is three miles to the southwest. According to the United States Census Bureau, the city has a total area of, of which is land and is water.
As of the census of 2010, there were 1,960 people, 746 households, and 462 families living in the city. The population density was. There were 845 housing units at an average density of. The racial makeup of the city was 74.7% White, 0.6% African American, 0.4% Native American, 0.3% Asian, 0.4% Pacific Islander, 22.4% from other races, and 1.2% from two or more races. Hispanic or Latino of any race were 45.3% of the population. There were 746 households of which 36.6% had children under the age of 18 living with them, 41.6% were married couplesliving together, 12.3% had a female householder with no husband present, 8.0% had a male householder with no wife present, and 38.1% were non-families. 31.5% of all households were made up of individuals and 15.6% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.24. The median age in the city was 32.9 years. 28.1% of residents were under the age of 18; 9.6% were between the ages of 18 and 24; 28.4% were from 25 to 44; 21.7% were from 45 to 64; and 12.4% were 65 years of age or older. The gender makeup of the city was 50.0% male and 50.0% female.
2000 census
As of the census of 2000, there were 1,958 people, 782 households, and 477 families living in the city. The population density was 1,068.4 people per square mile. There were 857 housing units at an average density of 467.6/sq mi. The racial makeup of the city was 89.12% White, 0.10% African American, 0.36% Native American, 0.15% Asian, 0.10% Pacific Islander, 8.63% from other races, and 1.53% from two or more races. Hispanic or Latino of any race were 21.86% of the population. There were 782 households out of which 29.7% had children under the age of 18 living with them, 44.0% were married couples living together, 12.5% had a female householder with no husband present, and 38.9% were non-families. 33.8% of all households were made up of individuals and 19.7% had someone living alone who was 65 years of age or older. The average household size was 2.44 and the average family size was 3.08. In the city, the population was spread out with 25.9% under the age of 18, 8.9% from 18 to 24, 26.8% from 25 to 44, 20.2% from 45 to 64, and 18.2% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 95.2 males. For every 100 females age 18 and over, there were 90.9 males. The median income for a household in the city was $20,691, and the median income for a family was $26,429. Males had a median income of $22,885 versus $15,491 for females. The per capita income for the city was $10,688. About 16.7% of families and 22.9% of the population were below the poverty line, including 27.5% of those under age 18 and 30.0% of those age 65 or over.
