Marysville is a city located in Union County Ohio. It is also the county seat of Union County. With a 2020 population of 25,609, it is the 59th largest city in Ohio and the 1513th largest city in the United States . Marysville is currently growing at a rate of 1.87% annually and its population has increased by 15.91% since the most recent census, which recorded a population of 22,094 in 2010. Marysville reached it's highest population of 25,609 in 2021. Spanning over 17 miles, Marysville has a population density of 1,566 people per square mile.
The average household income in Marysville is $87,446 with a poverty rate of 8.23%. The median rental costs in recent years comes to $1,014 per month, and the median house value is $190,600. The median age in Marysville is 35.1 years, 33.5 years for males, and 36.5 years for females.