# Maryland statistical areas

The U.S. State of Maryland currently has 13 statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated three combined statistical areas, six metropolitan statistical areas, and four micropolitan statistical areas in Maryland. As of 2023, the largest of these is the Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA, comprising Washington, D.C. and its suburbs as well as Maryland's largest city of Baltimore and its capital, Annapolis.

## 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 13 United States statistical areas and 24 counties of the State of Maryland :
| 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | Stafford County, Virginia | 165,248 | Arlington-Alexandria-Reston, VA-WV MD | 3,154,735 |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | Prince George's County, Maryland | 947,430 | Washington, DC-MD MD | 1,798,375 1,119,403 (MD) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | District of Columbia | 678,972 | Washington, DC-MD MD | 1,798,375 1,119,403 (MD) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | Charles County, Maryland | 171,973 | Washington, DC-MD MD | 1,798,375 1,119,403 (MD) |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA | 6,280,487 2,475,344 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 155,813 (MD) | Washington County, Maryland | 155,813 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 155,813 (MD) | Berkeley County, West Virginia | 132,440 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Hagerstown-Martinsburg, MD-WV MSA | 305,902 155,813 (MD) | Morgan County, West Virginia | 17,649 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Lexington Park, MD MSA | 210,009 | St. Mary's County, Maryland | 115,281 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Lexington Park, MD MSA | 210,009 | Calvert County, Maryland | 94,728 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Chambersburg-Waynesboro, PA MSA | 157,854 | Franklin County, Pennsylvania | 157,854 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | 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 5,742,108 (MD) | Easton, MD μSA | 37,823 | Talbot County, Maryland | 37,823 | none | none |
| Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 5,742,108 (MD) | Cambridge, MD μSA | 31,929 | Dorchester County, Maryland | 31,929 | none | none |
| Salisbury-Ocean Pines, MD CSA | 183,881 | Salisbury, MD MSA | 129,710 | Wicomico County, Maryland | 104,800 | none | none |
| Salisbury-Ocean Pines, MD CSA | 183,881 | Salisbury, MD MSA | 129,710 | Somerset County, Maryland | 24,910 | none | none |
| Salisbury-Ocean Pines, MD CSA | 183,881 | Ocean Pines, MD μSA | 54,171 | Worcester County, Maryland | 54,171 | none | none |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Philadelphia County, Pennsylvania | 1,550,542 | Philadelphia, PA MD | 2,127,262 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Delaware County, Pennsylvania | 576,720 | Philadelphia, PA MD | 2,127,262 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Montgomery County, Pennsylvania | 868,742 | Montgomery County-Bucks County-Chester County, PA MD | 2,064,510 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Bucks County, Pennsylvania | 645,984 | Montgomery County-Bucks County-Chester County, PA MD | 2,064,510 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Chester County, Pennsylvania | 549,784 | Montgomery County-Bucks County-Chester County, PA MD | 2,064,510 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Camden County, New Jersey | 527,196 | Camden, NJ MD | 1,304,786 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Burlington County, New Jersey | 469,167 | Camden, NJ MD | 1,304,786 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Gloucester County, New Jersey | 308,423 | Camden, NJ MD | 1,304,786 |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | New Castle County, Delaware | 578,592 | Wilmington, DE-MD-NJ MD | 749,602 105,672 (MD) |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Cecil County, Maryland | 105,672 | Wilmington, DE-MD-NJ MD | 749,602 105,672 (MD) |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA | 6,246,160 105,672 (MD) | Salem County, New Jersey | 65,338 | Wilmington, DE-MD-NJ MD | 749,602 105,672 (MD) |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Reading, PA MSA | 432,821 | Berks County, Pennsylvania | 432,821 | none | none |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Atlantic City-Hammonton, NJ MSA | 369,823 | Atlantic County, New Jersey | 275,213 | none | none |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Atlantic City-Hammonton, NJ MSA | 369,823 | Cape May County, New Jersey | 94,610 | none | none |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Dover, DE MSA | 189,789 | Kent County, Delaware | 189,789 | none | none |
| Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 105,672 (MD) | Vineland, NJ MSA | 152,326 | Cumberland County, New Jersey | 152,326 | none | none |
| none | none | Cumberland, MD-WV μSA | 94,140 67,273 (MD) | Allegany County, Maryland | 67,273 | none | none |
| none | none | Cumberland, MD-WV μSA | 94,140 67,273 (MD) | Mineral County, West Virginia | 26,867 | none | none |
| none | none | none | none | Caroline County, Maryland | 33,593 | none | none |
| none | none | none | none | Garrett County, Maryland | 28,423 | none | none |
| none | none | none | none | Kent County, Maryland | 19,303 | none | none |
| State of Maryland | State of Maryland | State of Maryland | State of Maryland | State of Maryland | 6,181,004 | none | none |

## 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 10 core-based statistical areas of the State of Maryland :
| 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 | Baltimore-Columbia-Towson, MD MSA | 2,834,316 | −0.36% | 2,844,510 | +4.94% | 2,710,489 |
| 2 | Washington-Arlington-Alexandria, DC-VA-MD-WV MSA (MD) | 2,471,268 | +0.15% | 2,467,596 | +11.40% | 2,215,133 |
| 3 | Lexington Park, MD MSA | 210,009 | +1.67% | 206,560 | +6.54% | 193,888 |
| 4 | Hagerstown-Martinsburg, MD-WV MSA (MD) | 155,813 | +0.72% | 154,705 | +4.93% | 147,430 |
| 5 | Salisbury, MD MSA | 129,710 | +1.17% | 128,208 | +2.40% | 125,203 |
| 6 | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD MSA (MD) | 105,672 | +1.88% | 103,725 | +2.59% | 101,108 |
| 7 | Cumberland, MD-WV μSA (MD) | 67,273 | −1.22% | 68,106 | −9.30% | 75,087 |
| 8 | Ocean Pines, MD μSA | 54,171 | +3.26% | 52,460 | +1.96% | 51,454 |
| 9 | Easton, MD μSA | 37,823 | +4.33% | 36,254 | +8.28% | 33,481 |
| 10 | Cambridge, MD μSA | 32,879 | +1.07% | 32,531 | −0.27% | 32,618 |
| | Cumberland, MD-WV μSA | 94,140 | −0.95% | 95,044 | −7.99% | 103,299 |
| | Hagerstown-Martinsburg, MD-WV MSA | 305,902 | +4.10% | 293,844 | +9.18% | 269,140 |
| | Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 6,246,160 | +0.02% | 6,245,051 | +4.69% | 5,965,343 |
| | Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 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 three combined statistical areas of the State of Maryland :
| 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 (MD) | 5,742,108 | −0.02% | 5,743,428 | +7.61% | 5,337,340 |
| 2 | Salisbury-Ocean Pines, MD CSA | 183,881 | +1.78% | 180,668 | +2.27% | 176,657 |
| 3 | Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA (MD) | 105,672 | +1.88% | 103,725 | +2.59% | 101,108 |
| | Philadelphia-Reading-Camden, PA-NJ-DE-MD CSA | 7,390,919 | +0.15% | 7,379,700 | +4.41% | 7,067,807 |
| | Washington-Baltimore-Arlington, DC-MD-VA-WV-PA CSA | 10,069,592 | +0.41% | 10,028,331 | +10.17% | 9,102,983 |