Warrensburg is a village in Macon County, Illinois, United States.

[3] Illinois Route 121 passes through the northeast side of the village, leading southeast 9 miles (14 km) to Decatur, the county seat, and northwest 14 miles (23 km) to Mount Pulaski.

According to the U.S. Census Bureau, Warrensburg has a total area of 0.73 square miles (1.89 km2), all land.

There were 527 housing units at an average density of 777.0 per square mile (300.0/km2).

22.4% of all households were made up of individuals, and 7.8% had someone living alone who was 65 years of age or older.