Herrin is a city located in Williamson County Illinois. With a 2020 population of 12,413, it is the 191st largest city in Illinois and the 2652nd largest city in the United States . Herrin is currently declining at a rate of -1.09% annually and its population has decreased by -0.70% since the most recent census, which recorded a population of 12,501 in 2010. Herrin reached it's highest population of 12,912 in 2016. Spanning over 10 miles, Herrin has a population density of 1,283 people per square mile.
The average household income in Herrin is $60,520 with a poverty rate of 17.20%. The median rental costs in recent years comes to $640 per month, and the median house value is $87,700. The median age in Herrin is 39.5 years, 38.2 years for males, and 40.6 years for females.