| Official Name: | Smithville, Illinois |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Illinois#USA |
| Pushpin Label: | Smithville |
| Coordinates: | 40.6606°N -89.8°W |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Peoria |
| Subdivision Type3: | Township |
| Subdivision Name3: | Logan |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 1.26 |
| Area Land Sq Mi: | 1.26 |
| Area Water Sq Mi: | 0.00 |
| Area Total Km2: | 3.28 |
| Area Land Km2: | 3.28 |
| Area Water Km2: | 0.00 |
| Population As Of: | 2020 |
| Population Density Km2: | 47.90 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 719 |
| Postal Code Type: | ZIP Code |
| Postal Code: | 61536 (Hanna City) |
| Area Code: | 309 |
| Blank Name: | FIPS code |
| Blank Info: | 17-70278 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2804096 |
| Population Total: | 157 |
| Unit Pref: | Imperial |
| Population Density Sq Mi: | 124.11 |
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 2miles south of Hanna City and west-southwest of downtown Peoria.
Smithville was first listed as a CDP prior to the 2020 census.