Wilsonville is a village in Macoupin County, Illinois, United States. The population was 604 at the 2000 census.Wilsonville is located at 394?12?N 8951?15?W? / ?39.07000N 89.85417W? / 39.07000; -89.85417.According to the 2010 census, Wilsonville has a total area of 0.986 square miles, of which 0.96 square miles is land and 0.026 square miles is water.As of the census of 2000, there were 604 people, 249 households, and 167 families residing in the village. The population density was 633.4 people per square mile. There were 273 housing units at an average density of 286.3 per square mile. The racial makeup of the village was 98.68% White, 0.17% Native American, 0.33% from other races, and 0.83% from two or more races. Hispanic or Latino of any race were 0.33% of the population.There were 249 households out of which 26.5% had children under the age of 18 living with them, 51.4% were married couples living together, 8.8% had a female householder with no husband present, and 32.