Mason is a city located in Warren County Ohio. With a 2020 population of 34,450, it is the 43rd largest city in Ohio and the 1146th largest city in the United States . Mason is currently growing at a rate of 0.85% annually and its population has increased by 12.17% since the most recent census, which recorded a population of 30,712 in 2010. Mason reached it's highest population of 34,450 in 2021. Spanning over 19 miles, Mason has a population density of 1,790 people per square mile.
The average household income in Mason is $138,441 with a poverty rate of 2.83%. The median rental costs in recent years comes to $1,348 per month, and the median house value is $267,300. The median age in Mason is 42.4 years, 40.7 years for males, and 44.3 years for females.