Pleasant Plains is a village in Sangamon County, Illinois, United States.

[3] According to the 2010 census, Pleasant Plains has a total area of 1.4 square miles (3.63 km2), all land.

The racial makeup of the village was 97.4% White, 0.5% African American, 0.4% Asian, and 1.3% from two or more races.

Its stated purpose is “To acquire, restore and maintain historical sites surrounding the community.” The Historical Society promptly took steps to purchase the Clayville, Illinois site, a goal accomplished in 2010.

Clayville, a Lincoln-era stagecoach stop, had been operated by a predecessor of the University of Illinois Springfield from the 1970s until 1992.