Miamisburg is a city located in Montgomery County Ohio. With a 2020 population of 20,605, it is the 80th largest city in Ohio and the 1809th largest city in the United States . Miamisburg is currently growing at a rate of 1.13% annually and its population has increased by 2.10% since the most recent census, which recorded a population of 20,181 in 2010. Miamisburg reached it's highest population of 20,605 in 2021. Spanning over 12 miles, Miamisburg has a population density of 1,689 people per square mile.
The average household income in Miamisburg is $75,890 with a poverty rate of 11.54%. The median rental costs in recent years comes to $815 per month, and the median house value is $144,600. The median age in Miamisburg is 41.1 years, 37.9 years for males, and 45 years for females.