United States · permanent federal-district record · DC

Washington, D.C.

District of Columbia at a glance

Classification: Federal district and seat of the government of the United States; Constitution Annotated, Seat of Government Clause · as of 2026-09-06D.C. is not a state.
Federal seat established: July 16, 1790; Residence Act, 1 Stat. 130 · as of 1790-07-16The Residence Act provided for the permanent seat of the federal government.
Total area: 68 sq mi; U.S. Census Bureau, State Area Measurements · as of 2010-01-012010 boundaries; feature updates through August 2010. The table is retained, not a current land survey.; What this measures
Total area · square miles
Land and water included in the Census area measurement for this jurisdiction.
Not land area alone. This retained statistical table uses 2010 boundaries and is not a new measurement made on the check date.
Recorded value: 68 square miles
Producer status: retained statistical measurement
Land area: 61 square miles. Total area includes water.
2010 · land + water
Census 2010 State Area Measurements
Last successful check: 2026-10-14
2010 boundaries; feature updates through August 2010. The table is retained, not a current land survey.
Official measure explanation ↗ · U.S. Census Bureau, State Area Measurements ↗ · Standard American Dictionary ↗
Gross domestic product: $193.0 billion; U.S. Bureau of Economic Analysis · 2025 annual2025 annual current-dollar GDP; not adjusted for inflation.; What this measures
Annual nominal GDP · current U.S. dollars
The value added by production of goods and services within this jurisdiction during the stated calendar year, measured in that year’s dollars.
Not adjusted for inflation; not personal income, a quarterly annualized figure, or purchasing-power-parity GDP. Intermediate inputs are not counted again as new output.
Recorded value: 192,975,400,000 current U.S. dollars
Producer status: estimate
2025 · current dollars
BEA annual state GDP update 2026-09-30 · released 2026-09-30
Last successful check: 2026-10-14
Official measure explanation ↗ · U.S. Bureau of Economic Analysis ↗
Area codes: 202 · 771; North American Numbering Plan Administrator, Planning Letter 547 · as of 2026-09-06771 overlays the historic 202 numbering-plan area.
Population: 693,645 people; U.S. Census Bureau, Population Estimates Program · as of 2025-07-01Resident population estimate; D.C. is a federal district.; What this measures
Resident population estimate · people
An estimate of the people whose usual residence is in this jurisdiction on July 1 of the stated year.
Not a decennial census count, daytime population, or future projection. A newer Census vintage can revise the same year.
Recorded value: 693,645 people
Producer status: estimate
2025 estimate
Census Vintage 2025
Last successful check: 2026-10-14
The official directory gives the publication month; exact day is not supplied by this CSV.
Official measure explanation ↗ · U.S. Census Bureau, Population Estimates Program ↗ · Standard American Dictionary ↗