# District of Columbia statistical areas

The United States District of Columbia (Washington, D.C.) is the primary city of two statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated the Washington-Arlington-Alexandria, DC-VA-MD-WV MSA and the more extensive Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA.

## Background

The Office of Management and Budget (OMB) has designated more than 1,000 statistical areas for the United States and Puerto Rico. These statistical areas are important geographic delineations of population clusters used by the OMB, the United States Census Bureau, planning organizations, and federal, state, and local government entities.
The OMB defines a core-based statistical area (commonly referred to as a CBSA) as the county or counties (or county-equivalents) surrounding at least one densely-settled core of at least 10,000 population, "plus adjacent counties having a high degree of social and economic integration with the core as measured through commuting ties with the counties containing the core". The OMB further divides core-based statistical areas based on population into metropolitan statistical areas (MSAs) for those with at least 50,000 and micropolitan statistical areas (μSAs) for those with 10,000 to 49,999 people.
The OMB defines a combined statistical area (CSA) as two or more adjacent core-based statistical areas where the employment interchange rate (% commuting from A to B plus % commuting from B to A) is at least 15%. The primary statistical areas (PSAs) include all combined statistical areas and any core-based statistical area that is not a constituent of a combined statistical area.

## Table

The two United States statistical areas of the District of Columbia :
| Combined statistical area | 2023 population (est.) | Core-based statistical area | 2023 population (est.) | County | 2023 population (est.) | Metropolitan division | 2023 population (est.) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Fairfax County, Virginia | 1,141,878 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Prince William County, Virginia | 489,640 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Loudoun County, Virginia | 436,347 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Arlington County, Virginia | 234,162 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Stafford County, Virginia | 165,428 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Alexandria, Virginia | 155,230 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Spotsylvania County, Virginia | 149,588 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Fauquier County, Virginia | 75,165 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Jefferson County, West Virginia | 59,787 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Culpeper County, Virginia | 54,973 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Manassas, Virginia | 42,696 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Warren County, Virginia | 41,843 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Fredericksburg, Virginia | 28,928 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Fairfax, Virginia | 25,144 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Manassas Park, Virginia | 16,361 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Clarke County, Virginia | 15,466 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | City of Falls Church, Virginia | 14,685 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Rappahannock County, Virginia | 7,414 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Prince George's County, Maryland | 947,430 | Washington, DC-MD MD | 1,798,375 678,972 (DC) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | District of Columbia | 678,972 | Washington, DC-MD MD | 1,798,375 678,972 (DC) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Charles County, Maryland | 171,973 | Washington, DC-MD MD | 1,798,375 678,972 (DC) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Montgomery County, Maryland | 1,058,474 | Frederick-Gaithersburg-Bethesda, MD MD | 1,351,865 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 678,972 (DC) | Frederick County, Maryland | 293,391 | Frederick-Gaithersburg-Bethesda, MD MD | 1,351,865 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Baltimore County, Maryland | 844,703 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Anne Arundel County, Maryland | 594,582 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Baltimore City, Maryland | 565,239 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Howard County, Maryland | 336,001 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Harford County, Maryland | 264,644 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Carroll County, Maryland | 176,639 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | Queen Anne's County, Maryland | 52,508 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 | Washington County, Maryland | 155,813 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 | Berkeley County, West Virginia | 132,440 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 | Morgan County, West Virginia | 17,649 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Lexington Park, MD μSA | 210,009 | St. Mary's County, Maryland | 115,281 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Lexington Park, MD μSA | 210,009 | Calvert County, Maryland | 94,728 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Chambersburg, PA MSA | 157,854 | Franklin County, Pennsylvania | 157,854 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Winchester, VA-WV MSA | 147,260 | Frederick County, Virginia | 95,994 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Winchester, VA-WV MSA | 147,260 | City of Winchester, Virginia | 27,617 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Winchester, VA-WV MSA | 147,260 | Hampshire County, West Virginia | 23,649 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Lake of the Woods, VA μSA | 38,574 | Orange County, Virginia | 38,574 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Easton, MD μSA | 37,823 | Talbot County, Maryland | 37,823 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 678,972 (DC) | Cambridge, MD μSA | 32,879 | Dorchester County, Maryland | 32,879 | none | none |
| District of Columbia | District of Columbia | District of Columbia | District of Columbia | District of Columbia | 678,972 |

## Core-based statistical areas

The following table provides the in-state population ranking of each CBSA along with its rate of population change over time.
The one core-based statistical area of the District of Columbia :
| 2023 rank | Core-based statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Core-based statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 1 | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA (DC) | 678,972 | −1.53% | 689,545 | +14.60% | 601,723 |
| | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,304,975 | +0.42% | 6,278,542 | +13.18% | 5,547,495 |

## Combined statistical areas

The following table provides the in-state population ranking of each CSA along with its rate of population change over time.
The one combined statistical area of the District of Columbia :
| 2023 rank | Combined statistical area | Population | Population | Population | Population | Population |
| 2023 rank | Combined statistical area | 2023 estimate | Change | 2020 Census | Change | 2010 Census |
| 1 | Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA (DC) | 678,972 | −1.53% | 689,545 | +14.60% | 601,723 |
| | Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 | +0.41% | 10,028,331 | +10.17% | 9,102,983 |