Combined Statistical Area in the United States
Washington–Baltimore combined statistical area
Washington–Baltimore–Arlington, DC–VA–MD–WV–PA Combined Statistical Area Interactive Map of Washington–Baltimore–Arlington,
DC–VA–MD–WV–PA
CSA Washington–Arlington–Alexandria
MSA Baltimore–Columbia–Towson, MD MSA
Hagerstown–Martinsburg, MD–WV MSA
Lexington Park, MD MSA
Chambersburg, PA MSA
Winchester, VA–WV MSA
Lake of the Woods, VA μSA
Cambridge, MD μSA
Coordinates:38°58′N 77°19′W / 38.97°N 77.32°W /38.97; -77.32 Country United States State or area Constituent metropolitan & micropolitan areas Core areas:Outlying areas:
Principal cities Population (2023)
• CSA
10,069,592 (3rd ) GDP • CSA $941.502 billion (2022)[failed verification ] Time zone UTC-5 (EST ) • Summer (DST ) UTC-4 (EDT )Area codes 202/771 ,301/240/227 ,304/681 ,410/443/667 ,540/826 ,703/571 ,717/223
Map of the 2012OMB -designated Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. TheWashington–Baltimore combined metropolitan statistical area is astatistical area , including the overlapping metropolitan areas ofWashington, D.C. andBaltimore . The region includes CentralMaryland ,Northern Virginia , three counties in theEastern Panhandle of West Virginia , andone county in south-centralPennsylvania . It is the most educated, highest-income, andthird-most populous combined statistical area in the United States behindNew York City–Newark, NJ andLos Angeles–Long Beach .[ 2] [ 3]
The area is designated by theOffice of Management and Budget (OMB) as theWashington–Baltimore–Arlington, DC–MD–VA–WV–PA Combined Statistical Area . It is composed primarily of two majormetropolitan statistical areas (MSAs), theWashington–Arlington–Alexandria, DC–VA–MD–WV MSA and theBaltimore–Columbia–Towson, Maryland Metropolitan Statistical Area. Five smaller urban areas not contiguous to the main urban area but having strong commuting ties with the main area are included in the metropolitan area:[ 4] Hagerstown–Martinsburg, Maryland–West Virginia MSA, theChambersburg–Waynesboro, Pennsylvania MSA, theWinchester, VA–WV MSA , theCalifornia–Lexington Park, Maryland MSA, and theEaston, Maryland micropolitan statistical area (μSA).
Some counties, such asCaroline andKing George County, Virginia , are not officially designated by OMB as members of this metropolitan area but still consider themselves members anyway.[ 5] [ 6] [ 7] [ 8] [ 9] This is mostly due to their proximity to the area, the size of their commuter population, and by the influence of local broadcasting stations. The population of the entire Washington–Baltimore Combined Statistical Area as of the2020 census was 9,973,383. The area's most-populous city is Washington, D.C. with a population of 689,545, and the area's most populous county isFairfax County, Virginia , with a population of 1,150,309.[ 10]
Components of the combined statistical area [ edit ] The counties and independent cities and their groupings that comprise the area are listed below with their 2012 population estimates. Central counties/cities (designated as such by OMB) for each MSA are shown in italics.
Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Area (5,860,342) Arlington–Alexandria–Reston, VA–WV Metropolitan DivisionArlington County, Virginia Clarke County, Virginia Culpeper County, Virginia Fairfax County, Virginia Fauquier County, Virginia Loudoun County, Virginia Prince William County, Virginia Rappahannock County, Virginia Spotsylvania County, Virginia Stafford County, Virginia Warren County, Virginia Alexandria, Virginia Fairfax, Virginia Falls Church, Virginia Fredericksburg, Virginia Manassas, Virginia Manassas Park, Virginia Jefferson County, West Virginia Frederick–Gaithersburg–Bethesda, MD Metropolitan Division (1,244,291) Washington, DC–MD Metropolitan Division (4,616,051) Baltimore–Columbia–Towson, MD Metropolitan Area (2,753,149) Hagerstown–Martinsburg, MD–WV Metropolitan Area (256,278) Chambersburg, PA Metropolitan Area (151,275) Winchester, VA–WV Metropolitan Area (130,907) California–Lexington Park, MD Metropolitan Area (108,987) Easton, MD Micropolitan Area (38,098) Lake of the Woods, VA Micropolitan Area Cambridge, MD Micropolitan Area Regional organizations [ edit ] Metropolitan Washington Council of Governments [ edit ] Founded in 1957, theMetropolitan Washington Council of Governments (MWCOG) is a regional organization of 23 Washington-area local governments, members of theMaryland andVirginia state legislatures, theU.S. Senate , and theU.S. House of Representatives . MWCOG provides a forum for discussion and the development of regional responses to issues regarding the environment, transportation, public safety, homeland security, affordable housing, community planning, and economic development.[ 11]
The National Capital Region Transportation Planning Board, a component of MWCOG, is the federally designatedMetropolitan Planning Organization for the metropolitan Washington area.[ 12]
Baltimore Metropolitan Council [ edit ] The Baltimore Metropolitan Council is the equivalent organization for the Baltimore portion of the combined Baltimore–Washington metropolitan area.[ 13] The BMC, which was created in 1992 as the successor to the Regional Planning Council and Baltimore Regional Council of Governments, consists of the Baltimore region's elected executives, representing Baltimore City and Anne Arundel, Baltimore, Carroll, Harford and Howard counties.[ 14]
The Baltimore Regional Transportation Board is the federally recognized Metropolitan Planning Organization for transportation planning in theBaltimore region.[ 14]
Baltimore Aberdeen, Maryland Annapolis, Maryland Arbutus, Maryland Bel Air, Maryland Brooklyn, Maryland Brooklyn Park, Maryland Catonsville, Maryland Cockeysville, Maryland Columbia, Maryland Curtis Bay, Maryland Dundalk, Maryland Eldersburg, Maryland Elkridge, Maryland Ellicott City, Maryland Essex, Maryland Fullerton, Maryland Glen Burnie, Maryland Halethorpe, Maryland Linthicum, Maryland Lutherville-Timonium, Maryland Middle River, Maryland North Laurel, Maryland Owings Mills, Maryland Overlea, Maryland Parkville, Maryland Pasadena, Maryland Perry Hall, Maryland Pikesville, Maryland Randallstown, Maryland Reisterstown, Maryland Savage, Maryland Severna Park, Maryland Towson, Maryland Westminster, Maryland Woodlawn, Maryland Washington, D.C. area[ edit ] Washington, D.C. Bethesda, Maryland Bowie, Maryland Chevy Chase, Maryland College Park, Maryland Frederick, Maryland Gaithersburg, Maryland Germantown, Maryland Greenbelt, Maryland Laurel, Maryland Potomac, Maryland Rockville, Maryland Silver Spring, Maryland Upper Marlboro, Maryland Alexandria, Virginia Annandale, Virginia Arlington, Virginia Ashburn, Virginia Chantilly, Virginia Fairfax, Virginia Falls Church, Virginia Fredericksburg, Virginia Great Falls, Virginia Herndon, Virginia Langley, Virginia Leesburg, Virginia Manassas, Virginia Manassas Park, Virginia Massaponax, Virginia McLean, Virginia Mt. Vernon, Virginia Reston, Virginia Springfield, Virginia Tysons, Virginia Vienna, Virginia California, Maryland Cambridge, Maryland Centreville, Maryland Easton, Maryland Hagerstown, Maryland Hancock, Maryland Lexington Park, Maryland Thurmont, Maryland Chambersburg, Pennsylvania McConnellsburg, Pennsylvania Waynesboro, Pennsylvania Culpeper, Virginia Warrenton, Virginia Winchester, Virginia Charles Town, West Virginia Martinsburg, West Virginia [ 16] Maryland's Washington suburbs are a major center forbiotechnology . Prominent local biotechnology companies includeMedImmune ,United Therapeutics ,The Institute for Genomic Research ,Human Genome Sciences , and theHoward Hughes Medical Institute .
Defense contracting [ edit ] Many defense contractors are based in Northern Virginia and Montgomery County, Maryland to be close tothe Pentagon in Arlington. Local defense contractors includeLockheed Martin , the largest, as well asNorthrop Grumman ,General Dynamics ,BAE Systems Inc. ,Computer Sciences Corporation (CSC),Booz Allen Hamilton ,Leidos ,Science Applications International Corporation (SAIC),Orbital Sciences Corporation , andAAI Corporation .
Notable company headquarters in the region [ edit ] Numbers denoteFortune 500 ranking.
Baltimore area:
Washington area:
M&T Bank Stadium inBaltimore , home field of theBaltimore Ravens of theNational Football League Table of professional teams and venues [ edit ] ^a b c d Year team moved to current location ^ Founded asD.C. United Women ; rebranded as Washington Spirit in 2012 and started NWSL play in 2013. Location of commercial airports in the Washington-Baltimore combined statistical area
Ronald Reagan Washington National Airport inCrystal City, Virginia , the nation's 23rd-busiest airport and busiest airport in the Washington-Baltimore areaBaltimore/Washington International Airport (BWI), the nation's 25th-busiest airport and second-busiest airport in the Washington-Baltimore areaDulles International Airport , the nation's 28th-busiest airport and third-busiest airport in the Washington-Baltimore areaWashington Metro TheCapital Beltway (I-495) inNorthern Virginia Baltimore Metro SubwayLink Commercial airports [ edit ] Rail transit systems [ edit ] Commuter/Regional Rail[ edit ] Interstates
U.S. Routes
State Routes
^ Signed as a DC state route following the MD-295 interchange in Tuxedo. ^ 295 is maintained by the National Park Service south of MD-175, by the Baltimore Dept. of Transportation in city limits, and by the Maryland State Highway Department all other sections. ^ "Gross Domestic Product by County and Metropolitan Area" .Federal Reserve Economic Data .Federal Reserve Bank of St. Louis .^ "CSA Median household income" .Greaterbaltimore.org . Archived fromthe original on 7 December 2012. Retrieved16 November 2017 .^ "Raleigh-Durham area ranks third in U.S. for college degrees" .Triangle.bizjournals.com . Retrieved16 November 2017 .^ "OMB BULLETIN NO. 18-04: Revised Delineations of Metropolitan Statistical Areas, Micropolitan Statistical Areas, and Combined Statistical Areas, and Guidance on Uses of the Delineations of These Areas" . Office of Management and Budget. September 14, 2018.^ "Caroline County Economic Development" . Archived fromthe original on 2015-07-11. Retrieved2015-07-21 .^ "Washington DC South" .washingtondcsouth.com . Retrieved16 November 2017 .^ "King George County Department of Economic Development" .King George County Department of Economic Development . Retrieved16 November 2017 .^ Gardner, D'Vera Cohn and Amy (16 March 2006)."3 Virginia Exurbs Near Top of U.S. in Growth" .Washingtonpost.com . Retrieved16 November 2017 . ^ "FAMPO Technical Committee – FAMPO" .Fampo.gwregion.org . Retrieved16 November 2017 .^ "2020 Population and Housing State Data" .U.S. Census Bureau . August 12, 2021. RetrievedSeptember 5, 2021 .^ "COG & Our Region - Metropolitan Washington Council of Governments" .Mwcog.org . Retrieved16 November 2017 .^ "Transportation Planning Board - Transportation - Metropolitan Washington Council of Governments" .Mwcog.org . Retrieved16 November 2017 .^ O'Leary, __Sara Ann."Home - Baltimore Metropolitan Council" .Baltometro.org . Retrieved16 November 2017 . ^a b About BMC – Baltimore Metropolitan Council Archived 2007-05-01 at theWayback Machine ^ "U.S. Census Bureau – Principal cities of metropolitan and micropolitan statistical areas" .Census.gov . Retrieved16 November 2017 .^ "Metropolitan And Micropolitan Statistical Areas And Principal Cities, November 2007, with codes" .Census.gov . Retrieved16 November 2017 .^ "Whiting-Turner Contracting on the Forbes America's Largest Private Companies List" .Forbes.com . Retrieved16 November 2017 .^ "The Boeing Company: General Information" .www.boeing.com . Retrieved2023-07-31 .^a b "Final CY23 Enplanements at All Commercial Service Airports" (PDF) . 2 October 2024.^ Weiner, Rachel (9 Oct 2025)."Budget cut means D.C. Streetcar will shut down in March" .The Washington Post .Archived from the original on 9 Oct 2025. Retrieved20 Oct 2025 .
Principal cities Communities Counties Geography Water Transportation See also
Principal cities (and city-like entities)
Maryland Virginia District of Columbia
Counties (and county equivalents)
See also
Core cities are metropolitan core cities of at least a million people. The other areas are urban areas of cities that have an urban area of 150,000+ or of a metropolitan area of at least 250,000+. Satellite cities are in italics.
Mid-Atlantic
Core cities Other areas Combined areas
New England
Core cities Other areas Combined areas