Hoyleton is a village in Washington County, Illinois, United States. The population was 531 at the 2010 census. It is the home town of former Montréal Expos and San Francisco Giants left-handed pitcher Kirk Rueter.Hoyleton is located in Illinois, United States of America. 38°26′39″N 89°16′18″W / 38.444035°N 89.271645°W / 38.444035; -89.271645.According to the 2010 census, Hoyleton has a total area of 0.75 square miles, all land.As of the census of 2000, there were 520 people, 186 households, and 130 families residing in the village. The population density was 692.9 people per square mile. There were 200 housing units at an average density of 266.5 per square mile. The racial makeup of the village was 94.81% White, 3.85% African American, 0.38% Asian, and 0.96% from two or more races. Hispanic or Latino of any race were 0.38% of the population. There were 186 households out of which 32.8% had children under the age of 18 living with them, 59.