Pekin Community High School District 303 is a public school district in Pekin, Illinois, that operates one high school, Pekin Community High School (PCHS). District 303 serves students living in Pekin and surrounding areas such as South Pekin, North Pekin, Marquette Heights, Creve Coeur, and Groveland. As of 2020 the school has 1,780 students.

The 125-acre (51 ha) campus includes its principal campus buildings totaling 550,000 square feet (51,000 m) of space; these buildings house 133 classrooms, the 600 seat F.M. Peterson Theater, two gymnasiums, a natatorium, and several computer labs.

The high school was built in 1915, and expanded multiple times to accommodate the growing student population. In 1959, the city planned to widen Eighth Street which ended future opportunities for continued expansion. Subsequently, the school district decided to build a second campus in 1962 and classes began in 1964. With the construction of the newer campus, PCHS was split into West Campus (original building) and East Campus (new building). Freshman and sophomores attended West Campus, while juniors and seniors attended East Campus. East Campus was expanded in 1997–1998, after which date West Campus closed and all four classes were reunited at the newer campus. After the local community lost in an attempt to save the original school building, demolition began in 2012 and was finished in 2014.

From the high school's founding until the 1981 school year, the football team was officially named the "Pekin Chinks", represented by a red dragon logo, done in part to represent the town of Pekin's wrongly supposed relation to the Chinese city of Peking. The team mascots were a male and a female student who would wear stereotypical Chinese attire, calling themselves the "Chink" and "Chinklette", and striking a gong whenever the team scored. In previous eras the community had almost no Chinese American residents.

In 1974 members of the National Organization of Chinese-Americans took offense to the name and suggested to municipal government employees that the sports team should have a different name. The members asked the mayor and the city attorney to intervene but the response was that they were unable to. The area Chamber of Commerce argued that the community took opposition to the idea of the mascot being offensive. That year, a vote was conducted within the student body to change the name, and the vote ended in a landslide victory for "chinks" at 1,034 votes to 182. In 1975 the Peoria Journal Star stopped including the mascot name in the publication. A second vote received similar results. As time passed additional publications no longer included the mascot name. The school stopped displaying statues of the mascots. In 1980, the school board forced a name change to "Pekin Dragons"; a name that has stayed to the present. By the 1990s, some graduates from the pre-dragon era of the district have expressed a desire for the original name to return, despite being criticized for being degrading, racist, and lacking common decency. Historian James W. Loewen noted that the name "Dragons" was also problematic, given that Pekin had been notorious for being a statewide Ku Klux Klan headquarters in the 1920s, with the Klan owning the Pekin Daily Times for several years, and with a prominent Klan leader still living in Pekin in 2005.

In April 2019, a web page on the website IdentifyEvropa connected Kevin Pummill, a PCHS social studies teacher, to messages under the name "Undercover Academic" on an Internet site of white supremacist group Identity Evropa. PCHS started an investigation, and the teacher resigned early in the investigation. The district superintendent said that the school confirmed that "the teacher made a number of troubling and offensive posts" on an Internet site. At first the school district refused to name Pummill as the teacher involved. The superintendent later said that "the school is not aware of any instances of discriminatory conduct against students by the teacher" as of 22 April 2019 but did not say whether the investigation was complete.

• Scott Altman, retired astronaut and Navy captain
• Mark Staff Brandl, artist, art historian and philosopher of art
• Everett Dirksen (class of 1913), politician representing Illinois in the U.S. House and Senate
• Larry Kenney, voice actor and radio personality
• Mark Luft, Illinois House of Representatives member and Pekin mayor
• D.A. Points, professional golfer
• Jerald D. Slack, retired Air National Guard major general
• Dave Snell, Bradley Braves men's basketball commentator
• Richard Stolley, founding managing editor of People and Life journalist responsible for obtaining the Zapruder film
• Rick Venturi, sports broadcaster and former football player and Northwestern head coach

• Pekin Community High School District 303