Anna is the largest community and retail trade center in Union County, Illinois, United States. Located in Southern Illinois, the population was 4,442 at the 2010 United States Census, a decline from 5,135 in 2000. The city is known for being tied to its close neighbor Jonesboro, together known as Anna-Jonesboro. Anna is known for the Choate Mental Health and Development Center, a state facility that first opened in 1869.
Anna is located at 37°27′40″N 89°14′20″W / 37.46111°N 89.23889°W / 37.46111; -89.23889.
According to the 2010 census, Anna has a total area of 3.519 square miles (9.11 km), of which 3.5 sq mi (9.06 km) (or 99.46%) is land and 0.019 sq mi (0.05 km) (or 0.54%) is water.
As of the census of 2010, there were 4,442 people, 1,893 households and 1,097 families residing in the city. The population density was 1,269.1 people per square mile. There were 2,123 housing units at an average density of 606.6 per square mile. The racial makeup of the city was 95.7% White, 1.1% African American, 0.6% American Indian and Alaskan Native, 0.4% Asian, <0.1% Pacific Islander, 1.2% from other races, and .9% from two or more races. Hispanic or Latino people (of any race) were 2.9% of the population.
There were 1,893 households out of which 24.2% had children under the age of 18 living with them, 42.6% were married couples living together, 14.1% had a female householder with no husband present, 4.8% had a male householder with no wife present and 42.0% were non-families. 37.8% of all households were made up of individuals and 21.0% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.85.
In the city, the population was spread out with 22.7% aged 19 and younger, 7.0% from 20 to 24, 22.7% from 25 to 44, 24.5% from 45 to 64, and 23.0% who were 65 years of age or older. The median age was 42.8 years. For every 100 females, there were 91.7 males.
The median income for a household in the city was $39,602, the median income for a family was $44,420. The incomes of 20.2% of the population were below the poverty level.