Royalton is a village in Franklin County, Illinois, United States. The population was 1,151 at the 2010 census.
Royalton is located in southwestern Franklin County at 37°52′49″N 89°6′49″W / 37.88028°N 89.11361°W / 37.88028; -89.11361 (37.880196, -89.113509). Illinois Route 149 passes through the center of town, leading north and east 4.5 miles (7.2 km) to Zeigler and west and south 4.5 miles (7.2 km) to Hurst.
According to the 2010 census, Royalton has a total area of 1.128 square miles (2.92 km), of which 1.12 square miles (2.90 km) (or 99.29%) is land and 0.008 square miles (0.02 km) (or 0.71%) is water.
As of the census of 2000, there were 1,130 people, 516 households, and 314 families residing in the village. The population density was 999.2 people per square mile (386.1/km²). There were 577 housing units at an average density of 510.2 per square mile (197.2/km²). The racial makeup of the village was 99.65% White, 0.09% Native American, and 0.27% from two or more races. Hispanic or Latino of any race were 0.27% of the population.
There were 516 households out of which 26.9% had children under the age of 18 living with them, 45.0% were married couples living together, 12.4% had a female householder with no husband present, and 39.1% were non-families. 35.5% of all households were made up of individuals and 19.6% 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 2.81.
In the village, the population was spread out with 22.7% under the age of 18, 7.1% from 18 to 24, 24.2% from 25 to 44, 26.5% from 45 to 64, and 19.5% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 88.3 males. For every 100 females age 18 and over, there were 83.6 males.
The median income for a household in the village was $23,947, and the median income for a family was $29,886. Males had a median income of $28,542 versus $21,250 for females. The per capita income for the village was $15,778. About 16.8% of families and 20.3% of the population were below the poverty line, including 21.2% of those under age 18 and 15.4% of those age 65 or over.