Mason is a city in southwestern Warren County, Ohio, United States, approximately 22 miles (35 km) from downtown Cincinnati. As of the 2010 census, Mason's population was 30,712.
Mason was transformed into a large, bustling community, and one of the most affluent in Greater Cincinnati, beginning in the 1990s. Mason sits at the core of the Cincinnati-Dayton Metropolitan Region, the 14th largest urban area in the nation. 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.
Mason is home to Kings Island amusement park and one of the largest tennis stadiums in the world, the Lindner Family Tennis Center, home of the Western & Southern Open, one of the world's top tennis tournaments for both men and women.
On June 1, 1803, Revolutionary War veteran William Mason paid $1,700 at auction to purchase 640 acres (2.6 km²) of land in what is now downtown Mason. In 1815, he platted 16 lots on this land and named the village "Palmira." In 1832, two years after the death of William Mason and according to his will, more than 40 additional lots were platted on the north, south, and west of Palmira. When the plat was officially recorded, the name of the village was listed as "Palmyra."
In 1835, a petition was sent to the federal post office to correct the name of the town. It had been listed as Kirkwood, possibly an error because the postmaster at the time was William Kirkwood. When village officials were informed that there was another Palmyra in Ohio, the name was officially changed to "Mason."
As of the census of 2010, there were 30,712 people, 11,016 households, and 8,205 families residing in the city. The population density was 1,648.5 inhabitants per square mile (636.5/km²). There were 11,471 housing units at an average density of 615.7 per square mile (237.7/km²). The racial makeup of the city was 85.1% White, 3.3% African American, 0.2% Native American, 9.0% Asian, 0.1% Pacific Islander, 0.8% from other races, and 1.5% from two or more races. Hispanic or Latino of any race were 3.2% of the population.
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