What are the largest metro areas in Maryland?
Washington-Arlington-Alexandria, DC-VA-MD-WV is the largest metro area in Maryland, with 6,465,724 residents in 2025 (Census PEP). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD (6,329,118) and Baltimore-Columbia-Towson, MD (2,857,781) come next.
Data as of 2025 · updated
All 6 ranked Maryland metro areas
| Rank | Metro area | Residents 2025 | Change 2020–25 |
|---|---|---|---|
| 1 | Washington-Arlington-Alexandria, DC-VA-MD-WV | 6,465,724 | +3.3% |
| 2 | Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 6,329,118 | +1.4% |
| 3 | Baltimore-Columbia-Towson, MD | 2,857,781 | +0.4% |
| 4 | Hagerstown-Martinsburg, MD-WV | 315,280 | +7.1% |
| 5 | Lexington Park, MD | 211,176 | +2.1% |
| 6 | Salisbury, MD | 131,872 | +2.9% |
How this is ranked
The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Only metropolitan statistical areas of two or more counties are ranked (OMB Bulletin 23-01): a one-county area's figures are its county's, and micro areas are left out. An area that crosses a state line is ranked in each of its states. Areas without an estimate for the same year as the others are not ranked.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.
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Questions
What is the largest metro area in Maryland?
Washington-Arlington-Alexandria, DC-VA-MD-WV is the largest metro area in Maryland, with 6,465,724 residents in 2025 (Census PEP). Philadelphia-Camden-Wilmington, PA-NJ-DE-MD (6,329,118) and Baltimore-Columbia-Towson, MD (2,857,781) come next.
How is this ranking calculated?
The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Only metropolitan statistical areas of two or more counties are ranked (OMB Bulletin 23-01): a one-county area's figures are its county's, and micro areas are left out. An area that crosses a state line is ranked in each of its states. Areas without an estimate for the same year as the others are not ranked.