Pleasant Plains is a village in Sangamon County, Illinois, United States. The population was 777 at the 2000 census. It is part of the Springfield, Illinois Metropolitan Statistical Area.
Pleasant Plains is located at 39°52′27″N 89°55′12″W / 39.87417°N 89.92000°W / 39.87417; -89.92000 (39.874221, -89.920106).
According to the 2010 census, Pleasant Plains has a total area of 1.4 square miles (3.63 km), all land.
As of the census of 2010, there were 802
people, 310 households, and 228 families residing in the village. The population density was 626.0 people per square mile (241.9/km). There were 310 housing units at an average density of 255.4 per square mile (98.7/km). The racial makeup of the village was 97.4% White, 0.5% African American, 0.4% Asian, and 1.2% from two or more races. Hispanic or Latino of any race were 0.9% of the population.
There were 310 households out of which 36.8% had children under the age of 18 living with them, 57.1% were married couples living together, 11.6% had a female householder with no husband present, and 26.5% were non-families. 23.2% of all households were made up of individuals and 10.4% had someone living alone who was 65 years of age or older. The average household size was 2.59 and the average family size was 3.00.
In the village, the population was spread out with 28.2% under the age of 18, 5.2% from 20 to 24, 26.5% from 25 to 44, 25.8% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 38.5 years. 47.1% of the population was male and 52.9% of the population was female.
The median income for a household in the village was $46,053, and the median income for a family was $51,111. Males had a median income of $38,482 versus $25,446 for females. The per capita income for the village was $18,714. About 3.5% of families and 2.9% of the population were below the poverty line, including 4.7% of those under age 18 and none of those age 65 or over.