| Official Name: | Darwin, Illinois |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Illinois#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Illinois |
| Subdivision Type2: | County |
| Subdivision Name2: | Clark |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 466 |
| Coordinates: | 39.2833°N -87.6119°W |
| Area Code: | 217 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 406956 |
Darwin is an unincorporated community in Darwin Township, Clark County, Illinois, United States. Darwin is located along the Wabash River across from the state of Indiana.
Darwin was originally called McClare's Bluff, and under the latter name had its start in the 1820s.[1] It became the county seat of Clark County in 1823,[2] and the first Clark County Courthouse was built there in 1827. Local government remained in Darwin until relocating to Marshall following an 1837 referendum.