Clay City is a village in Clay County, Illinois, United States. The population was 847 at the 2020 census. Clay City was named for the Kentucky statesman Henry Clay. Geography Clay City is located in southeastern Clay County at (38.686883, -88.353121), about southwest of the Little Wabash River. U.S. Route 50 passes through the southern side of the village, leading west to Flora and east to Olney. Louisville, the Clay County seat, is to the northwest. According to the 2021 census gazetteer files, Clay City has a total area of , all land. Demographics As of the 2020 census there were 847 people, 356 households, and 239 families residing in the village. The population density was . There were 432 housing units at an average density of . The racial makeup of the village was 97.52% White, 0.24% Native American, 0.12% Asian, and 2.13% from two or more races. Hispanic or Latino of any race were 0.24% of the population. There were 356 households, out of which 68.54% had children under the age of 18 living with them, 51.12% were married couples living together, 8.43% had a female householder with no husband present, and 32.87% were non-families. 29.49% of all households were made up of individuals, and 19.38% had someone living alone who was 65 years of age or older. The average household size was 3.07 and the average family size was 2.52. The village's age distribution consisted of 28.8% under the age of 18, 7.6% from 18 to 24, 25.6% from 25 to 44, 21.8% from 45 to 64, and 16.2% who were 65 years of age or older. The median age was 31.9 years. For every 100 females, there were 82.9 males. For every 100 females age 18 and over, there were 93.9 males. The median income for a household in the village was $45,104, and the median income for a family was $49,688. Males had a median income of $36,875 versus $21,875 for females. The per capita income for the village was $23,317. About 19.7% of families and 22.1% of the population were below the poverty line, including 39.1% of those under age 18 and 14.5% of those age 65 or over. History In the early 1800s Solomon Harter Mueller (later Miller) came to Clay City, IL. with his Cherokee wife (later Ida) and 6 children, from W. Virginia to establish a farm and grinding Mill. He