The City of Falls Church is an independent city in Virginia, United States, in the Washington Metropolitan Area. The city population was 11,711 in 2009, up from 10,377 in 2000. Taking its name from The Falls Church, an 18th-century Anglican parish, Falls Church gained township status within Fairfax County in 1875. In 1948, it was incorporated as the City of Falls Church, an independent city with county-level governance status. It is also referred to as Falls Church City.

The city's corporate boundaries do not include all of the area historically known as Falls Church; these areas include Seven Corners and other portions of the current Falls Church postal districts of Fairfax County, as well as the area of Arlington County known as East Falls Church, which was part of the town of Falls Church from 1875 to 1936. For statistical purposes, the US Department of Commerce's Bureau of Economic Analysis combines the City of Falls Church with Fairfax City and Fairfax County.

According to the United States Census Bureau, the city has a total area of 2.2 square miles (5.2 km²), all of it land. The center of the city is the crossroads of Virginia State Route 7 (W. Broad St./Leesburg Pike) and U. S. Route 29 (Washington St./Lee Highway).

The Tripps Run watershed drains two-thirds of the City of Falls Church, while the Four Mile Run watershed drains the other third. Four Mile Run flows at the base of Minor's Hill, which overlooks Falls Church on its north, and Upton's Hill, which bounds the area to its east.