Miamisburg is a city located in Ohio. With a 2020 population of 19,917, it is the 85th largest city in Ohio and the 1861st largest city in the United States. Miamisburg is currently declining at a rate of -0.06% annually and its population has decreased by -1.31% since the most recent census, which recorded a population of 20,181 in 2010. Miamisburg reached it's highest population of 20,168 in 2010. Spanning over 12 miles, Miamisburg has a population density of 1,633 people per square mile.
The average household income in Miamisburg is $74,860 with a poverty rate of 11.99%. The median rental costs in recent years comes to $779 per month, and the median house value is $141,700. The median age in Miamisburg is 41.7 years, 39.7 years for males, and 44.8 years for females. For every 100 females there are 93.1 males.