Effingham County is a county located in the southern part of the U.S. state Illinois. As of the 2010 census, the population was 34,242. Its county seat and largest city is Effingham.
Some other cities in Effingham County, Illinois include Altamont, Teutopolis (T-Town), Beecher City, Montrose, Dieterich, Shumway, Watson, Mason, Edgewood, Heartville, and Funkhouser. Effingham County comprises the Effingham, IL Micropolitan Statistical Area.
According to the U.S. Census Bureau, the county has a total area of 480 square miles (1,200 km), of which 479 square miles (1,240 km) is land and 1.2 square miles (3.1 km) (0.3%) is water.
Just west of Effingham on Interstate 70 there is a 198-foot (60 m) white cross; 35,000 vehicles are estimated to pass the site each day. It is one of the world’s tallest crosses, and took over 200 short tons (180 t) of steel to erect.
As of the 2010 United States Census, there were 34,242 people, 13,515 households, and 9,302 families residing in the county. The population density was 71.5 inhabitants per square mile (27.6/km). There were 14,570 housing units at an average density of 30.4 per square mile (11.7/km). The racial makeup of the county was 97.6% white, 0.4% Asian, 0.2% black or African American, 0.1% American Indian, 0.8% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 1.7% of the population. In terms of ancestry, 41.6% were German, 10.0% were Irish, 9.3% were American, and 8.8% were English.
Of the 13,515 households, 32.7% had children under the age of 18 living with them, 54.9% were married couples living together, 9.5% had a female householder with no husband present, 31.2% were non-families, and 26.9% of all households were made up of individuals. The average household size was 2.50 and the average family size was 3.03. The median age was 39.2 years.
The median income for a household in the county was $49,509 and the median income for a family was $61,373. Males had a median income of $40,951 versus $28,209 for females. The per capita income for the county was $24,843. About 7.8% of families and 10.5% of the population were below the poverty line, including 14.1% of those under age 18 and 7.4% of those age 65 or over.