Frankfort is a city located in Will County Illinois. With a 2020 population of 19,831, it is the 124th largest city in Illinois and the 1876th largest city in the United States . Frankfort is currently growing at a rate of 1.17% annually and its population has increased by 11.52% since the most recent census, which recorded a population of 17,782 in 2010. Frankfort reached it's highest population of 19,831 in 2021. Spanning over 16 miles, Frankfort has a population density of 1,232 people per square mile.
The average household income in Frankfort is $158,838 with a poverty rate of 2.94%. The median rental costs in recent years comes to $1,240 per month, and the median house value is $384,900. The median age in Frankfort is 42.1 years, 42.1 years for males, and 42 years for females.