Franklin is a city located in Morgan County Illinois. With a 2020 population of 584, it is the 819th largest city in Illinois and the 12659th largest city in the United States . Franklin is currently declining at a rate of -1.18% annually and its population has decreased by -4.26% since the most recent census, which recorded a population of 610 in 2010. Franklin reached it's highest population of in . Spanning over 1 miles, Franklin has a population density of 705 people per square mile.
The average household income in Franklin is $68,923 with a poverty rate of 6.55%. The median rental costs in recent years comes to $775 per month, and the median house value is $91,900. The median age in Franklin is 39.4 years, 38.7 years for males, and 46.1 years for females.