Walnut is a village in Bureau County, Illinois, United States.

[4] According to the 2021 census gazetteer files, Walnut has a total area of 0.80 square miles (2.07 km2), all land.

33.63% of all households were made up of individuals and 16.55% had someone living alone who was 65 years of age or older.

Besides the local public schools, Christ Lutheran School, located in nearby Sterling, serves students of various religious backgrounds from Walnut to Milledgeville and from Morrison to Dixon.

As part of the largest network of Protestant schools in the US, CLS provides an education for students from age 3 through 8th grade that is focused on all of the core academic subjects while remaining true to the Bible.