Smithville is an unincorporated community and census-designated place (CDP) in Peoria County, Illinois, United States. It is in the southern part of the county, in the center of Logan Township. It is south of Hanna City and west-southwest of downtown Peoria.
Smithville was first listed as a CDP prior to the 2020 census. As of the 2020 census, Smithville had a population of 157.
Smithville first appeared as a census designated place in the 2020 U.S. census.
The school district is Farmington Central Community Unit School District 265.