| Official Name: | Joslin, 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: | Rock Island |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 12.74 |
| Area Land Km2: | 12.02 |
| Area Water Km2: | 0.71 |
| Area Total Sq Mi: | 4.92 |
| Area Land Sq Mi: | 4.64 |
| Area Water Sq Mi: | 0.27 |
| Population As Of: | 2020 |
| Population Total: | 85 |
| Population Density Km2: | 7.07 |
| Population Density Sq Mi: | 18.31 |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 581 |
| Coordinates: | 41.5572°N -90.2219°W |
| Area Code: | 309 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 411258[2] |
Joslin is an unincorporated community in Rock Island County, Illinois, United States and is located on Illinois Route 92 near Interstate 88.
Tyson operates a beef slaughter plant in Joslin.
The Joslin Fairgrounds were the original site of the Rock Island County Fair, from the first fair in 1892 until the late 1920s.[3]