Herrin is a city in Williamson County, Illinois. The population was 12,352 at the 2020 census. 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. History The settlement of Herrin started out as scattered settlers on Herring's Prairie named for the first permanent settler Isaac Herring, a Baptist preacher. Later, his son-in-law David Herrin arrived and the similarity in names led to the eventual shortening of the name to just Herrin's Prairie. The trails from Jordan's fort to Humphreys' ford on the Big Muddy River intersected the old trail from Lusk's ferry at modern-day Golconda to Kaskaskia, which was first settled by French colonists. Isaac Herring entered the first land in what became Herrin on 4 November 1816, two years before Illinois became a state. He paid $2 an acre for the . At the time he lived to the west in Jackson County, the land entry was the northeast quarter off Section 30, Township 8 South, Range 2 East of the Third Principal Meridian. Today that area runs between 17th and 27th streets, and from West Cherry Street on the north to West Stotlar Street on the south. David Ruffin Harrison started storekeeping on the prairie in 1858. During the Civil War, he built a frame store building and secured a fourth class post office that opened on May 26 1864. After coal was discovered and mining began in nearby Carterville, Harrison, and his cousins Ephraim Snyder Herrin and Mrs. Williams in 1892 prospected for coal beginning at the southwest corner of Williams' farm, identified in 1939 as the corner of Legion Blvd and E Herrin St. (Legion Blvd no longer appears on the maps, but the reference indicates the intersection was the North and North East public roads. The 1908 county atlas shows North East Public Road two blocks east of Park Avenue which would make it North 13th Street). "The men put up the cash, Mrs. Williams boarded the workers. A fine vein of coal was found at 185 feet." In 1895, the Chicago and Carbondale Railroad organized to lay tracks between the Illinois Central Railroad at Carbondale and connect with the new Chicago, Paducah and Memphis Railroad that had opened up in 1894, going through the central part of the county. (This one