[2] It is a part of Fairfax County Public Schools (FCPS), serving students from the communities including Chantilly and Centreville as well as areas with Herndon addresses in grades 9–12.

Westfield students won this contest, whose result was approved by former principal Mike Campbell with the concert date set for Tuesday, November 16.

[14] Following the incident, students and parents appealed to the school board to return pep rallies to the instructional period and to reconsider the regulation.

In a review by the Parent Teacher Student Association, it was found that the school was only allowed one pep rally during the year, adding to the confusion of the situation.

[15] In February 2005, FCPS clarified its policy stating that the regulation on pep rallies was not meant to limit school spirit, but the concert remained cancelled.

Journalists from the international media arrived at Westfield the day Cho's identity was announced, prompting a ban on reporters at six athletic games due "the impact... on school children, academics and other important activities.

"[25] Criticism of the school's learning environment also prompted students and alumni to rally against the media's biased reporting by emphasizing their many achievements.

The second incident occurred on November 20, when ten young adults and teenagers (six of them being Westfield High School alumni, and others attending Virginia Commonwealth University) were arrested as part of the shutdown of a major heroin ring responsible for the deaths of multiple students from Westfield and other local high schools.

[11] When the school opened, the unincorporated communities of Centreville and Chantilly experienced a population and real estate boom that was not projected by the county.

[35] In April 2003, FCPS proposed a bond referendum for the construction of a 24-room addition to Westfield's main building to alleviate the rapid growth of the student population.

[40] Northern Virginia's New Life Christian Church held services at Westfield after relocating its main campus from Stone Middle School before building and moving to the Zone.

[42] In 2003, the Work Awareness and Transition (WAT) class opened a branch of the Apple Federal Credit Union for students and faculty.

The local area pro women's softball team Washington Glory will call the Westfield Sports Complex home for its 2008 season.

The stadium will have increased seating for not only the Glory but also for the Virginia State Softball Championships which will also be hosted at the site along with baseball, lacrosse, soccer and track.

[57] The Fine and Performing Arts department produced a news program which broadcasts information and upcoming events at or involving Westfield over the school's televisions on a daily basis.

[58][59] The school's athletic program is one of the most successful in the area, having earned numerous titles and championship berths in a wide range of varsity sports since 2000.

Beginning with the 2017–18 academic year, it belongs to the Concorde District within Region D.[63] The football team won their fourth state championship in 2016 with a double overtime victory over Oscar Smith High School 34–28 and finished 13–2.

One of the most successful athletic programs at Westfield is the wrestling team, having won eight district championships (2004–2009, 2011–2012), five Northern Region titles (2008–2010, 2012, 2020) and placing frequently in the top ten at the State Tournament.

On October 11, 2002, a tremendous downpour postponed a Westfield varsity football game against rival Centreville for the Concorde District championship.

[79] In 2013, Westfield finished 2nd in the Concorde district behind rival Centreville with an 8–2 record before rallying to win three playoff games including a 19–16 upset over previously undefeated Lake Braddock before reaching their third straight regional final and second in three years against the Centreville Wildcats[80] But in the regional final, the Bulldogs were soundly defeated by the eventual state champion Wildcats 35–14 due in large part to the Wildcats Wing-T offense that included South Carolina tailback AJ Turner, Cincinnati tailback/fullback Taylor Boose, James Madison defensive back Charles Tutt, and Vanderbilt offensive tackle/guard Justin Skule.

[83] The win propelled the team to the VHSL 6A State Championship against the Oscar Smith Tigers marking only the second time in history that the two schools met.

In 2015, the Bulldogs went on a winning streak advancing to the state championship for the first time in school history before losing to the Colonial Forge Eagles 47–46 ending their season at 27–2.

2016 brought a new story as the Bulldogs once again advanced to the state title game where they would face the Oscar Smith Tigers in a rematch of that season's football championship won by Westfield 49–42 in 3OT.

This time however, it wasn't close as Westfield defeated Oscar Smith 74–56 win their first state championship for basketball in school history.

[86] Since the showing of its first production, an original creation of The Glass Menagerie,[87] Westfield's theatre arts department has received numerous distinctions.

Playwright Sheila Callaghan's Star-Crossed Lovers, a one-act rendition of William Shakespeare's Romeo and Juliet, was conceived by director Scott Pafumi and premiered at Westfield in 2004.

Calliope not only accepts submissions for its literary and art magazine, but it also hosts Coffeehouses in the fall and spring, where student bands, guitarists, and poets perform live.

All three publications are noted for their journalistic qualities[107] and their capability in raising a large amount of funding from business advertisement to offset the cost of printing.

[119] In 2007, Westfield and its business partner Northrop Grumman teamed with NASA to participate in the school's first FIRST Robotics Competition at Virginia Commonwealth University for a regional event.

[122] Sponsored by the Herndon-Dulles Chamber of Commerce and hosted by Westfields Marriott, the seminar has been well received by the community, winning a Blue Ribbon Award for Outstanding Event.