Herrin is located in Williamson County. About 12,352 people live here (as of 2020). Between 2010 and 2020, the population declined from 12,501 to 12,352. The region is at 128 meters above sea level. The area covers about 25.8 square kilometers. There are about 534 streets in Herrin. The region was founded in 1816. The postal codes are 62948. The dialing code is 618. Herrin is city in Williamson County, Illinois, United States. Among other things, Herrin has supermarkets, schools, hairdressers and pharmacies. More information at
www.herrinillinois.com.