Because of the local street network configuration, many of Clarendon's 40-45 blocks resemble triangles rather than squares. The precise dimensions of Clarendon are not defined, and several different sets of boundaries are often used. These include:
The central geographic/cultural/economic features of Clarendon are the Clarendon Metro station, Market Common Clarendon and the Whole Foods Market at Clarendon Boulevard and Edgewood Street. As Clarendon's profile both as a popular destination and marketing location have increased, its informal boundaries have expanded west toward Virginia Square and east toward Courthouse, two adjacent Metro station areas.
History
First platted in 1900 at the top of a hill on the Georgetown-Falls Church Road, Clarendon evolved into Arlington County's original "downtown" after the arrival of electric trolleys in 1896. During the early 20th century, two interurban trolley lines converged in Clarendon a short distance west of today's Clarendon Metro station. One of these trolley lines traveled between Rosslyn and Clarendon along the present routes of Lynn Street, Fairfax Drive and Clarendon Boulevard to a station at the present intersection of Clarendon Boulevard and Washington Boulevard. Metrorail's Orange Line now closely follows this line's former route. The other line traveled from downtown Washington, crossed the Potomac River over the Highway Bridge and traveled along Washington Boulevard to reach the Clarendon station. Trolleys from both lines traveled between Clarendon, Ballston and Falls Church along the present routes of Fairfax Drive, I-66 and the Orange Line. Some of these trolleys traveled as far as the towns of Vienna and Fairfax. Like many other interurbans around the country, these lines were to remain in service until the mid-1930s, when they succumbed to the automobile and Depression-era economics. The village of Clarendon was named and dedicated March 31, 1900. In 1920, the same year in which Arlington County adopted its name, a movement to incorporate Clarendon as a town was defeated in the courts. Over time, Clarendon became Northern Virginia's retail center. Department stores including J.C. Penney and Sears opened stores in Clarendon, and other retailers extended west along Wilson Blvd and Fairfax Drive to Virginia Square and, farther west, the Parkington Shopping Center anchored by the Hecht Company, which was later enlarged and renamed as the Ballston Common Mall. Built in 1937, the Arlington Post Office is the first known federal building constructed in the county after the American Civil War that is not within a larger federally-owned property. Previously Arlington's mail was handled in Washington, D.C.. Lobby murals depicting scenes about Arlington history were painted by Auriel Bessemer in 1939. In 2000, it was named in honor of Joseph L. Fisher, former U.S. representative from Virginia's 10th district. The building is a designated Arlington County landmark and is listed on the National Register of Historic Places. By early 1975, two Vietnamese grocery stores had been opened in Clarendon, and in ensuing years Clarendon came to be known as "Little Saigon". Many Vietnamese refugees immigrated to the Washington D.C., and Arlington, due to the proximity to the nation's capital, and existing social, family, and business connections. This neighborhood was home to commercial uses of Vietnamese grocery stores, restaurants, department stores, cafes, and entertainment to serve the large Vietnamese population. Business was attractive to Vietnamese immigrants in this neighborhood due to the depressed rents during the time of construction of the WMATA Clarendon metro station. Vietnamese restaurants adjacent to Clarendon Metro like Queen Bee, and Cafe Dalat, closed in the end of 2005 and Little Viet Garden closed at the end of 2008. Nam Viet is the only restaurant that remains in 2014. Since the opening of the Clarendon Metro station in December 1979, Clarendon has become well known for its eclectic mix of unique shops, trendy bars, and small restaurants. More recently, luxury apartments, office buildings and upscale chain stores have been constructed and gentrified the area, although some of the original businesses do remain. The former Sears store's parking lot and automotive department, briefly considered as a site for a Home Depot, was developed as a mixed residential/commercial project that now includes townhouses, luxury apartments, and national chain retail stores. At least a half dozen restaurants closed in 2016.
Clarendon today
Clarendon is also host to several local and County-wide events each year, including Arlington's Neighborhood Day parade, the Mardi Gras parade and Tax Blues Night. The largest annual event, "Clarendon Day," is held on a Saturday in mid-October and features four live music stages, local restaurant and coffee house booths, clothing, jewelry, antiques and collectibles sales, children's games and rides, an ice-cream eating contest and other local traditions. Additionally, each spring Clarendon is host to the Clarendon Cup, part of the , one of the largest one-day professional and amateur bicycle races in the U.S. A farmers market at Clarendon's Central Park is held Wednesday afternoons from spring through mid-December and features organic produce, baked goods, plants and herbs, homemade soaps and other items for sale.