Title: Geography of Washington, D.C.
Content:   Washington, D.C., in the United States, is located at 38.895°N, -77.03639°W (the coordinates of the Zero Milestone, on The Ellipse). According to the United States Census Bureau, the city has a geographical area of 68.3 sqmi, 61.4 sqmi of which is land, and the remaining 6.9 sqmi (10.16%) of which is water. Washington is surrounded by the states of Virginia (on its southwest side) and Maryland (on its southeast, northeast, and northwest sides); it interrupts those states' shared border, which is the south shore of the Potomac River both upstream and downstream from the District. The portion of the Potomac River that passes Washington is virtually entirely within the District's border, as the District extends to the south bank. The city contains the historic "federal city", which was formerly part of those two adjacent states before they respectively ceded it for the national capital. The land ceded from Virginia was returned by Congress in 1847, so what remains of the modern District was all once part of Maryland.
Title: Washington, D.C.
Content:  Washington, D.C., formally the District of Columbia, also known as just Washington or just D.C., is the capital city of the United States. It is located on the east bank of the Potomac River which forms its southwestern and southern border with the U.S. state of Virginia, and shares a land border with the U.S. state of Maryland on its remaining sides. The city was named for George Washington, the first president of the United States and a Founding Father, and the federal district is named after Columbia, a female personification of the nation. As the seat of the U.S. federal government and several international organizations, the city is an important world 
Title: Washington, D.C.
Content:  Washington, D.C., is located in the mid-Atlantic region of the U.S. East Coast. Due to the District of Columbia retrocession, the city has a total area of 68.34 sqmi, of which 61.05 sqmi is land and 7.29 sqmi (10.67%) is water. The district is bordered by Montgomery County, Maryland to the northwest; Prince George's County, Maryland to the east; Arlington County, Virginia to the west; and Alexandria, Virginia to the south. Washington, D.C., is 38 mi from Baltimore, 124 mi from Philadelphia and 227 mi from New York City. The south bank of the Potomac River forms the district's border with Virginia and has two major tributaries: the Anacostia River and Rock Creek. 
Title: Outline of Washington, D.C.
Content: The District of Columbia is: The federal capital district of the United States of America ; Location ; Northern hemisphere ; Western hemisphere ; Americas ; North America ; Anglo America ; Northern America ; United States of America ; Contiguous United States ; Eastern United States ; East Coast of the United States &ndash; even though the District of Columbia does not include any coastline, it is generally considered to be part of the Eastern Seaboard region. ; Northeast megalopolis ; Mid-Atlantic states ; Population of Washington, D.C.: 601,723 (2010 U.S. Census ) ; Area of Washington, D.C.: 63.8 mi sq 
Title: Outline of Washington, D.C.
Content:  The following outline is provided as an overview of and topical guide to District of Columbia: Washington, D.C., legally named the District of Columbia, in the United States of America, was founded on July 16, 1790, after the inauguration of City of Washington, the new capital of the country. The area given to District of Columbia, was originally 100 sqmi ceded by the states of Maryland and Virginia in accordance with the Residence Act; however, in 1846, the retrocession of the District of Columbia, meant that the area of 31 sqmi which was ceded by Virginia was returned, leaving 69 sqmi of territory originally ceded by Maryland as the current area of the District in its entirety. The City of Washington was originally a separate municipality within the Territory of Columbia until the District of Columbia Organic Act of 1871 effectively merged the City and the Territory into a single entity. It is for this reason that everything within its boundaries is legally the District of Columbia.
Title: United States naval districts
Content: Washington, D.C. 
Title: Southern United States
Content:  Listed below are states that are defined by the Census Bureau as the Southern United States. Washington, D.C. is located in the Southern United States region as defined by the Census Bureau, but serves as the capital city of the United States, and is not a state.
Title: George Washington
Content:  Many places and monuments have been named in honor of Washington, most notably the capital of the United States, Washington, D.C. The state of Washington is the only US state to be named after a president.
Title: Geography of Washington, D.C.
Content: Bethesda, Maryland ; Brookmont, Maryland ; Capitol Heights, Maryland ; Chevy Chase (CDP), Maryland ; Chevy Chase Village, Maryland ; Chillum, Maryland ; Colmar Manor, Maryland ; Coral Hills, Maryland ; Cottage City, Maryland ; Fairmount Heights, Maryland ; Glassmanor, Maryland Hillcrest Heights, Maryland ; Mount Rainier, Maryland ; Seat Pleasant, Maryland ; Silver Hill, Maryland ; Silver Spring, Maryland ; Suitland, Maryland ; Takoma Park, Maryland ; Alexandria, Virginia ; Arlington, Virginia ; McLean, Virginia (touches Washington, D.C., at one corner only) The District of Columbia is bordered by various cities, towns, villages, and unincorporated CDPs in Maryland and Virginia. Following is a list of those adjacent communities.   In addition to the places named above, there are other small unincorporated parts of Prince George's County, Maryland, which also border the District.
Title: Washington metropolitan area
Content:  The Washington metropolitan area (also known as the National Capital Region and colloquially as the DMV for "D.C., Maryland, Virginia") is the metropolitan area centered on Washington, D.C., the capital of the United States. The area includes all of the federal district and parts of the U.S. states of Maryland, Virginia and West Virginia. It is part of the larger Baltimore–Washington metropolitan area. The Washington D.C. metropolitan area is one of the most educated and most affluent metropolitan areas in the US. The metro area anchors the southern end of the densely populated Northeast megalopolis with an estimated total population of 6,385,162, making it the sixth-largest metropolitan area in the nation and the largest metropolitan area in the Census Bureau's South Atlantic division.

Question: what state is washington d.c. located?
Answer: Washington.