Joslin is an unincorporated community in Rock Island County, Illinois, United States and is located on Illinois Route 92 near Interstate 88. As of the 2020 census, Joslin had a population of 85.
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.
Joslin first appeared as a census designated place in the 2020 U.S. census.
It is in the Riverdale Community Unit School District 100.