| Official Name: | Blair, 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: | Randolph |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 502 |
| Coordinates: | 38.0447°N -89.7419°W |
| Area Code: | 618 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 404539 |
Blair is an unincorporated community in Randolph County, Illinois, United States. Blair is 5miles west-northwest of Steeleville.
The town is named for Thomas Blair, the first postmaster and first justice of the peace. In 1860, a post office was established.[1]