| Official Name: | Fall Creek, Illinois |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Adams |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.14 |
| Area Land Km2: | 0.14 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.06 |
| Area Land Sq Mi: | 0.06 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 31 |
| Population Density Km2: | 217.69 |
| Population Density Sq Mi: | 563.64 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 476 |
| Coordinates: | 39.7789°N -91.3025°W |
| Area Code: | 217 |
| Blank Name: | FIPS code |
| Blank Info: | 17-25245 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 422689 |
Fall Creek is an unincorporated community and census-designated place in Fall Creek Township, Adams County, Illinois, United States. Fall Creek is located along Interstate 172 southwest of Payson.
Fall Creek takes its name from a nearby creek of the same name, which was named for a waterfall along its course.[2] A post office called Falls Creek was established in 1861, and closed in 1866. The post office was reestablished in 1872, the name was changed to Fallcreek in 1894, and the post office was discontinued in 1909.[3]
Fall Creek is located at . According to the 2021 census gazetteer files, Fall Creek has a total area of 0.06sqmi, all land.[4]
As of the 2020 census[5] there were 31 people, 14 households, and 14 families residing in the CDP. The population density was 563.64PD/sqmi. There were 12 housing units at an average density of 218.18/sqmi. The racial makeup of the CDP was 93.55% White, 3.23% Asian, and 3.23% from two or more races.