National Weather Service Baltimore/Washington

On January 29, 2011, Bethany Anne Decker (née Littlejohn; born May 13, 1989) left her husband's parents' home in Maryland and returned to her apartment in Ashburn, Virginia. Her boyfriend, Ronald Roldan, says he saw her there later that day. She has not been seen since. While Decker did not show up at her job or classes she took at nearby George Mason University, her absence was not noted for another three weeks, since messages to her friends purportedly from her continued to be posted on her Facebook account. After her family noted her absence otherwise, they found her car parked near her apartment. Apart from the Facebook posts, there had been no other evidence she had done anything since the day she was last seen. They reported her missing to Loudoun County Sheriff's Office. Decker was five months pregnant at the time of her disappearance. Extensive searches have found no trace of her or the child she might have given birth to. Roldan, who had a criminal record prior to the disappearance, was arrested in North Carolina in 2015 and charged with the attempted murder of another girlfriend after he shot her during an incident in 2014; he has not said anything about the Decker case. After she recovered, the victim claimed on the Dr. Phil show that he had made statements to her that might implicate him in Decker's disappearance. Roldan pled guilty to two lesser charges in 2016; after he served his sentence, he was expected to be deported to his native Bolivia. Instead, he was charged with Decker's abduction upon his release in 2020 and returned to Loudoun County. The incident has been the subject of a segment of the Investigation Discovery channel series Disappeared.

Loudoun Valley Estates is a census-designated place (CDP) in Loudoun County, Virginia, United States. The population as of the 2010 United States Census was 3,656. It is a Toll Brothers community located near the planned Ashburn Metro station complex and Moorefield Station town center in the southern part of Ashburn, Virginia. Loudoun Valley Estates is governed by a homeowners' association.It was formerly part of the county planning commission's Urban Policy Area but has been removed. The community is served by the Loudoun County Parkway.

Moorefield is a census-designated place (CDP) in Loudoun County, Virginia, United States. As of the 2010 census, the CDP was named Moorefield Station, and the population was 77. As of 2019, the estimated population was 1,976. Moorefield is a mixed-use development currently in progress, located at the Ashburn station currently under construction at the planned terminus of the Metrorail Silver Line.

Ashburn is a planned Washington Metro station in Loudoun County, Virginia, United States, on the Silver Line. Originally planned to begin operation in 2018, the station is now expected to open in July 2022. Ashburn will be the western terminus of the line; the current western terminus is Wiehle–Reston East station, which opened with phase one of the Silver Line in July 2014.In April 2015, the Washington Metropolitan Area Transit Authority approved the Loudoun County Board of Supervisors' name for the stop.Ashburn station is located at the median of the Dulles Greenway (SR 267) east of Old Ryan Road (SR 772). It will be the furthest station from the Washington city center, and the closest to West Virginia, being only 26.5 miles (42.6 km) by road from Keyes Gap.

Loudoun Gateway is a planned Washington Metro station in Loudoun County, Virginia on the Silver Line. It will be located at SR 606 (Old Ox Road) and the ramps to SR 267. Originally planned to begin operations in 2018, the station is now is now expected to open in July 2022. In April 2015, the Washington Metropolitan Area Transit Authority approved the Loudoun County Board of Supervisors' name for the stop.

Ryan is an unincorporated community in Loudoun County, Virginia, United States. The community was once at the corner of Shellhorn, Ryan, and Waxpool roads. It is now a part of the Ashburn communities.

American Airlines Flight 444 was a scheduled American Airlines flight from Chicago to Washington, D.C.'s National Airport. On November 15, 1979, the Boeing 727 serving the flight was attacked by "the Unabomber", Ted Kaczynski, who sent the bomb in the mail and set it to detonate at a certain altitude. The bomb partially denotated in the cargo hold and caused "a sucking explosion and a loss of pressure," which was then followed by large quantities of smoke filling the passenger cabin, forcing the pilots to make an emergency landing at Dulles International Airport. Twelve passengers had to be treated afterward for smoke inhalation.

Dulles International Airport is a planned Washington Metro station at Washington Dulles International Airport in Loudoun County, Virginia, U.S., on the Silver Line. Originally planned to be operational by 2018, the station is now expected to open in July 2022. The station was originally planned to be underground, but was built as an above-ground station next to daily parking garage one.

Washington Dulles International Airport (IATA: IAD, ICAO: KIAD, FAA LID: IAD), typically referred to as Dulles International Airport, Dulles Airport, Washington Dulles or simply Dulles ( DUL-iss), is an international airport in the Eastern United States, located in Loudoun County and Fairfax County in Virginia, 26 miles (42 km) west of Downtown Washington, D.C. Opened in 1962, it is named after John Foster Dulles (1888–1959), the 52nd U.S. Secretary of State who served under President Dwight D. Eisenhower. The Dulles main terminal is a well-known landmark designed by Eero Saarinen, who also designed the famous TWA terminal (now the TWA hotel) at New York's JFK airport. Operated by the Metropolitan Washington Airports Authority, Washington Dulles Airport occupies 13,000 acres (20.3 sq mi; 52.6 km2) straddling the Loudoun–Fairfax line. Most of the airport is in the unincorporated community of Dulles in Loudoun County, with a small portion in the unincorporated community of Chantilly in Fairfax County. Dulles is one of the three major airports in the larger Baltimore–Washington metropolitan area, the others being Reagan National Airport and Baltimore/Washington International Airport, and by land size and amount of facilities is the largest of the three. Dulles is considered the region's international air hub, with dozens of nonstop international flights. Dulles has the most international passenger traffic of any airport in the Mid-Atlantic outside the New York metropolitan area, including approximately 90% of the international passenger traffic in the Baltimore–Washington region. It had more than 20 million passenger enplanements every year from 2004 to 2019, with 24 million enplanements in 2019. On a typical day, more than 60,000 passengers pass through Dulles to and from more than 125 destinations around the world.Increased domestic travel from Reagan National Airport has eroded some of Dulles's domestic routes. Dulles overtook Reagan in total enplanements in 2019. However, in 2018, Dulles Airport surpassed Ronald Reagan Washington National Airport (DCA) in yearly passenger boardings after having fewer passengers since 2015. Furthermore, it still ranks behind Baltimore/Washington International Thurgood Marshall Airport (BWI) in total annual passenger boardings.Dulles is a hub for United Airlines and is frequently used by airlines which United has codeshare agreements with, mostly composed of Star Alliance members like Turkish Airlines and Lufthansa.

Dulles () is an unincorporated area in Loudoun County, Virginia, United States, and is part of the Washington metropolitan area. The headquarters of Northrop Grumman Innovation Systems and ODIN Technologies, as well as the former headquarters of MCI Inc. and AOL are located in Dulles. The National Weather Service Baltimore/Washington forecast office and the National Weather Service's Sterling Field Support Center are also both in Dulles.

Broad Run High School is a public secondary school in Ashburn, an unincorporated area in Loudoun County, Virginia, United States. Broad Run is part of the Loudoun County Public Schools system (LCPS). It was ranked as the #1 Best Public High School in Loudoun County and the #9 Best Public High School in Virginia by U.S. News in 2020. Originally a rural school serving all of eastern Loudoun County, the growth of the county's population beginning in the mid-1990s has resulted in systematic reduction of Broad Run's attendance area as it spun off eight of the district's high schools from within its original boundaries. Initial surroundings of farm fields have been replaced by housing tracts and the school now possesses one of the most culturally diverse student populations in the region. Broad Run High School is also located in one of the most affluent zip codes and counties in the country with recorded median income of more than $100,000 per household. After a period of high construction in the early 2000s, the number of high schools in the area stayed the same until Briar Woods and Freedom High School opened in 2005, John Champe High school in 2012, Rock Ridge High School in 2014, and Riverside High School completed construction in 2015.In 1969, Loudoun County opened its third public high school amidst corn fields in Ashburn to accommodate the growing student populations resulting from new housing developments in the unincorporated communities in the eastern half of the county. Since then, the county population has increased nearly sevenfold (most of it in the east), straining education budgets, infrastructure, and local politics. For Ashburn, this has resulted in constantly shifting attendance boundaries as new schools are constantly being opened, at all levels, elementary, middle, and high. The area's student demographics have significantly changed as well: Loudoun County's residents are now the country's most affluent (per capita), and its ethnic composition continues to diversify as foreign immigration into Northern Virginia increases. Before the 2011–2012 school year, additional lockers were installed due to increases in the school's population.

Briar Woods High School is a public secondary school located in Ashburn, an unincorporated area in Loudoun County, Virginia, United States, and is part of Loudoun County Public Schools. The school serves students who live in the Broadlands, Brambleton, and Waxpool communities.