Blandinsville is a village in McDonough County, Illinois, United States. The population was 777 at the 2000 census.The town is named for Joseph L. Blandin, owner of the first general store. In 1842, the town was platted on a tract known as Job's Settlement, named after early settlers William and Ira Job. A post office was established in 1843. The Frank Hicks House in Blandinsville was constructed by architect George Franklin Barber in 1895.According to the 2010 census, Blandinsville has a total area of 0.88 square miles, all land. Twin Oaks Golf course is on the western edge of town.As of the census of 2000, there were 777 people, 339 households, and 224 families residing in the village. The population density was 878.2 people per square mile. There were 353 housing units at an average density of 399.0 per square mile. The racial makeup of the village was 98.71% White, 0.13% Asian, 0.51% from other races, and 0.64% from two or more races. Hispanic or Latino of any race were 0.