Marion is a city located in Ohio. With a 2020 population of 35,307, it is the 39th largest city in Ohio and the 1114th largest city in the United States. Marion is currently declining at a rate of -1.09% annually and its population has decreased by -4.15% since the most recent census, which recorded a population of 36,837 in 2010. Marion reached it's highest population of 38,646 in 1970. Spanning over 12 miles, Marion has a population density of 2,996 people per square mile.
The average household income in Marion is $49,209 with a poverty rate of 20.52%. The median rental costs in recent years comes to $718 per month, and the median house value is $73,500. The median age in Marion is 37.3 years, 36.3 years for males, and 38.9 years for females. For every 100 females there are 129.3 males.