Herrin is a city in Williamson County, Illinois, United States. The population was 12,501 at the 2010 census. It is home to Country Music star David Lee Murphy, the hometown of baseball's Cleveland shortstop Ray Chapman, and the hometown of San Diego State University men's basketball coach Steve Fisher, as well as Medal of Honor recipient Joseph William Ozbourn.
The city is part of the Marion-Herrin Micropolitan Area and is a part of the Carbondale-Marion-Herrin, Illinois Combined Statistical Area with 123,272 residents, the sixth most populous Combined statistical area in Illinois. The city is also part of the Metro Lakeland area.
Herrin is located at 37°48′9″N 89°1′41″W / 37.8025°N 89.02806°W / 37.8025; -89.02806 (37.802412, -89.028093).