Zion is a city located in Illinois. With a 2020 population of 23,321, it is the 102nd largest city in Illinois and the 1643rd largest city in the United States. Zion is currently declining at a rate of -0.71% annually and its population has decreased by -4.47% since the most recent census, which recorded a population of 24,413 in 2010. Zion reached it's highest population of 24,412 in 2010. Spanning over 10 miles, Zion has a population density of 2,382 people per square mile.
The average household income in Zion is $63,788 with a poverty rate of 17.19%. The median rental costs in recent years comes to $1,013 per month, and the median house value is $124,000. The median age in Zion is 32.1 years, 31.4 years for males, and 32.8 years for females. For every 100 females there are 88.9 males.