Mason is an affluent city in southwestern Warren County, Ohio, United States, 22 miles away from Cincinnati (296,943). As of the 2010 census, Mason's population was 30,712. Mason has experienced fast growth, with its historic Main Street remaining at the center of the community. Mason went from being a sleepy farm town of less than 5,000 residents in the 1960's to a large bustling community of Cincinnati commuters in the 1990's. Much of that growth came when Kings Island opened in 1972, and another growth spurt took place when Procter & Gamble built a large business center. Mason is home to Kings Island, and one of the largest tennis stadiums in the world.
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, 2 years after the death of William Mason and according to his will, over 40 more 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." Mason remained a small farming community for another 125 years. In 1970, a year before the town was incorporated to become a city, there were fewer than 5,700 residents. Famous Mason residents have included: Actor George Clooney, who attended Mason's Western Row Elementary School as well as St. Susanna Catholic School as a youth; Dan Patrick (Mason class of 1974 - formerly Dan Pugh), national radio host, NBC Sports host, Sports Illustrated columnist, and former ESPN anchor; Major League Baseball Hall-of-Famer Tom Seaver; and World Golf Hall of Fame member Nancy Lopez.
As of the census of 2000, there were 22,016 people, 7,789 households, and 5,981 families residing in the city. The population density was 1,250.0 people per square mile (482.7/km²). There were 8,111 housing units at an average density of 460.5 per square mile (177.8/km²). The racial makeup of the city was 94.79% White, 1.61% African American, 0.19% Native American, 2.18% Asian, 0.01% Pacific Islander, 0.30% from other races, and 0.93% from two or more races. Hispanic or Latino of any race were 0.97% of the population.