New buildings were built for Mason High School on North East Street in 1911, 1936, and 1953.
[5] Procter & Gamble opened a Health Care Research Center that spurred construction on almost 40 new subdivisions in Mason.
[7] By 1998, it had become Mason's fifth-largest employer, with a $23 million annual budget and 574 employees.
[8] The district responded to funding and overcrowding concerns by opening a new middle school in 1994,[6] signing a 10-year, $1.1 million contract with Pepsi in 1997,[9] and opening the $71.9 million, three-story, 379,000-square-foot (35,200 m2) William Mason High School in September 2003.
[13] Kings Local Schools covers parts of Mason and Deerfield Township to the east, Lebanon City Schools includes some areas to the north that have been annexed into the City of Mason, Princeton City Schools includes small portions of Deerfield and West Chester townships to the southwest, and Lakota Local Schools includes the remainder of West Chester Township to the west.