Spillertown is a village in Williamson County, Illinois.

According to the United States Census Bureau, as of 2000 Spillertown has a population of just over 200 people. The village has a total land area of 0.3 square miles.

The racial demographics of Spillertown are over 97.27% White, 1.36% African American, 0.45% Asian, 0.91% from other races. Hispanic or Latino of any race were 3.64% of the population.

Spillertown has over 80 households. The median income for a household in the village is $33,125, and the median income for a family is $47,917

Williamson County is located in southern Illinois and is surrounded six other counties.

According to the U.S. Census Bureau of 20060, Williamson County has a population of more than 60,000 people. The county has a total area of 444 square miles with 21 square miles of water.

Williamson County is divided into 12 townships. The county seat is Carlinville.

Williamson County is home to part of the national protected area of Crab Orchard National Wildlife Refuge, which has over 40,000 acres.