

Mason is a city in southwestern Warren County, Ohio, United States. It is about 22 miles (35 km) from downtown Cincinnati. 34,792 people lived there in the 2020 census.
In 2013, Mason was ranked seventh in Money Magazine's 2013 Top 50 Best Places to live in the United States. In 2008 and 2011, CNN named Mason one of the top 100 places to live in the United States.