Maryland County Map
All 24 counties with county seats and major cities
Maryland is made up of 23 counties and Baltimore City, an independent city that stands on a par with the counties. This map shows all 24 counties and their county seats. Tap a county for details, or download the free printable map below.
Updated October 4, 2026 · Boundaries: U.S. Census Bureau 2025 · Population: Census estimates for July 1, 2025
Maryland county facts
- Number of counties
- 24
- Largest by land area
- Frederick County 661 sq mi
- Smallest by land area
- Baltimore city 80.9 sq mi
- Most people
- Montgomery County 1,074,582
- Fewest people
- Kent County 19,565
- Fastest growing since 2020
- Frederick County +11.5%
- Highest median household income
- Howard County $149,763
- Oldest county
- St. Mary's County est. 1637
- Newest county
- Garrett County est. 1872
- State capital
- Annapolis Anne Arundel County
Baltimore City is an independent city. It was incorporated within Baltimore County in 1796, became a separate government in 1851, and the Census Bureau counts it as a county equivalent.
The first Charles County, created in 1650, lost all its land to the new Calvert County in 1654. The present Charles County dates from 1658.
List of 24 Maryland counties
Sorted A–Z. Click a column to sort, or a name to show it on the map. Download as CSV
| County | County seat | Population 2025 | Change since 2020 | Land area (sq mi) | Median income | Established | FIPS |
|---|---|---|---|---|---|---|---|
| Allegany County | Cumberland | 66,848 | −1.9% | 422 | $59,603 | 1789 | 24001 |
| Anne Arundel County | Annapolis | 603,380 | +1.8% | 415 | $124,911 | 1650 | 24003 |
| Baltimore County | Towson | 847,650 | −0.8% | 598 | $91,768 | 1659 | 24005 |
| Baltimore city | Baltimore | 569,997 | −2.7% | 81 | $62,177 | 1851 | 24510 |
| Calvert County | Prince Frederick | 94,484 | +1.8% | 213 | $133,922 | 1654 | 24009 |
| Caroline County | Denton | 34,116 | +2.5% | 319 | $68,457 | 1773 | 24011 |
| Carroll County | Westminster | 176,677 | +2.2% | 448 | $118,211 | 1837 | 24013 |
| Cecil County | Elkton | 107,131 | +3.3% | 346 | $92,007 | 1674 | 24015 |
| Charles County | La Plata | 176,593 | +6% | 458 | $122,816 | 1658 | 24017 |
| Dorchester County | Cambridge | 33,628 | +3.4% | 541 | $61,839 | 1668 | 24019 |
| Frederick County | Frederick | 302,883 | +11.5% | 661 | $122,002 | 1748 | 24021 |
| Garrett County | Oakland | 28,370 | −1.5% | 649 | $67,688 | 1872 | 24023 |
| Harford County | Bel Air | 266,446 | +2.1% | 437 | $112,265 | 1773 | 24025 |
| Howard County | Ellicott City | 339,183 | +2.1% | 251 | $149,763 | 1851 | 24027 |
| Kent County | Chestertown | 19,565 | +1.9% | 277 | $80,147 | 1642 | 24029 |
| Montgomery County | Rockville | 1,074,582 | +1.2% | 493 | $132,450 | 1776 | 24031 |
| Prince George's County | Upper Marlboro | 970,374 | +0.3% | 483 | $101,798 | 1696 | 24033 |
| Queen Anne's County | Centreville | 54,448 | +9.2% | 372 | $112,826 | 1706 | 24035 |
| Somerset County | Princess Anne | 24,973 | +1.5% | 320 | $64,943 | 1666 | 24039 |
| St. Mary's County | Leonardtown | 116,692 | +2.6% | 359 | $119,446 | 1637 | 24037 |
| Talbot County | Easton | 38,238 | +1.9% | 269 | $84,811 | 1662 | 24041 |
| Washington County | Hagerstown | 157,731 | +2% | 458 | $77,747 | 1776 | 24043 |
| Wicomico County | Salisbury | 106,899 | +3.2% | 374 | $76,210 | 1867 | 24045 |
| Worcester County | Snow Hill | 54,459 | +3.8% | 468 | $81,745 | 1742 | 24047 |
Maryland county map with cities
The largest cities in Maryland and the counties they are in. Cities that cross a county line list every county, the main one first. To find any smaller town, use the search box above.
| City | County | Population 2025 |
|---|---|---|
| Baltimore | Baltimore city | 569,997 |
| Frederick | Frederick County | 92,059 |
| Gaithersburg | Montgomery County | 71,113 |
| Rockville | Montgomery County | 67,563 |
| Bowie | Prince George's County | 58,383 |
| Hagerstown | Washington County | 44,228 |
| Annapolis | Anne Arundel County | 40,634 |
| College Park | Prince George's County | 35,418 |
| Salisbury | Wicomico County | 33,845 |
| Laurel | Prince George's County | 30,254 |
| Greenbelt | Prince George's County | 24,948 |
| Hyattsville | Prince George's County | 21,158 |
| Westminster | Carroll County | 20,589 |
| Cumberland | Allegany County | 18,799 |
| Aberdeen | Harford County | 18,374 |
| Easton | Talbot County | 17,293 |
| Takoma Park | Montgomery County | 17,260 |
| Elkton | Cecil County | 16,670 |
| Havre de Grace | Harford County | 15,630 |
| New Carrollton | Prince George's County | 13,644 |
| Cambridge | Dorchester County | 13,457 |
| La Plata | Charles County | 12,137 |
| Bel Air | Harford County | 10,507 |
| Mount Airy | Carroll and Frederick counties | 9,857 |
| Bladensburg | Prince George's County | 9,671 |
| Brunswick | Frederick County | 9,380 |
| Mount Rainier | Prince George's County | 8,307 |
| Taneytown | Carroll County | 8,259 |
| Riverdale Park | Prince George's County | 7,343 |
| Frostburg | Allegany County | 6,979 |
Printable Maryland county maps (free PDF, PNG, SVG)
Every map is free to print and share. The PDFs are vector files with real text, so they stay sharp at any size and you can search them for a county name. Use 11×17 (tabloid) for the most readable labels.
Color map with names
All 24 counties labeled, county seats marked. Letter and 11×17 PDF, high-resolution PNG, editable SVG.
Map with cities
Counties with their county seat towns and major cities.
Blank outline map
County lines only, no names. For quizzes, coloring and your own notes.
Numbered map with key
A number in every county with an alphabetical key.
Black and white
Labeled map that prints well on any printer.
Population map
Counties shaded by population density (2025 estimates).
Data and GIS files
The county table as CSV, and the boundaries as GeoJSON and KML (Google Earth, Google My Maps).
How Maryland got 23 counties and a separate city
Maryland's counties formed over three centuries. St. Mary's, set up in 1637, was meant to serve the entire colony. Kent followed by 1642 to serve the east side of Chesapeake Bay, and Anne Arundel in 1650. Western Maryland was divided step by step: Frederick County was created in 1748, Washington was split from Frederick in 1776, Allegany from Washington in 1789, and Garrett from Allegany in 1872. Garrett was the last county formed. The state constitution still lets the General Assembly organize new counties, but only with the consent of a majority of voters in the area, and no new county may have less than 400 square miles or fewer than 10,000 inhabitants. Baltimore City is the 24th unit. It was incorporated inside Baltimore County in 1796, separated from it in 1851, and has been treated on a par with the counties since the Constitution of 1851.
County maps of neighboring states
Delaware county map
District of Columbia county map
Pennsylvania county map
Virginia county map
West Virginia county map
Maryland counties: questions and answers
- How many counties are in Maryland?
- Maryland has 24 counties. The Census Bureau counts 24 county equivalents: 23 counties and the independent city of Baltimore. Maryland treats Baltimore City on a par with its counties.
- What is the largest county in Maryland?
- By land area, Frederick County is the largest (661 sq mi). By population, Montgomery County is the largest, with 1,074,582 people (2025 estimate).
- What is the smallest county in Maryland?
- Baltimore city is the smallest by land area (80.9 sq mi). Kent County has the fewest people: 19,565 (2025 estimate).
- What is the wealthiest county in Maryland?
- By median household income, Howard County ranks first with $149,763 (American Community Survey 2020–2024). The lowest is Allegany County at $59,603.
- What county is Baltimore in?
- Baltimore is in Baltimore city.
- What county is Frederick in?
- Frederick is in Frederick County.
- What county is Gaithersburg in?
- Gaithersburg is in Montgomery County.
- What county is Annapolis in?
- Annapolis, the state capital, is in Anne Arundel County.
- How can I see county lines on Google Maps?
- Google Maps does not draw county lines. Download the KML file from the printable maps section above and import it into Google My Maps (Create a new map › Import) or open it in Google Earth to see every Maryland county boundary on top of Google's map.
- Can I use this map for free?
- Yes. The maps and files on this page are free to print, share and use in your own work, including commercial projects, under the CC BY 4.0 licence. Please credit “WhichCounty (whichcounty.com)”.
Use this map on your site
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Sources and methodology
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000), simplified for display. Projection: Lambert conformal conic fitted to Maryland.
- Population: Census Bureau county estimates, Vintage 2025 (July 1, 2025), compared with the April 1, 2020 estimates base.
- Land area: Census Bureau 2026 Gazetteer files. Median household income: American Community Survey 2020–2024 5-year estimates.
- County seats and founding years: Wikidata (CC0), checked against state lists by WhichCounty. Cities: Census Bureau city and town estimates, Vintage 2025.
- Maryland Manual On-Line: Counties by date of formation (Maryland State Archives)
- Maryland Constitution, Article XIII: New Counties (Maryland Manual On-Line)
- Maryland Manual On-Line: Baltimore City (Maryland State Archives)
- Glossary: Geographic terms (U.S. Census Bureau)
- Atlas of Historical County Boundaries: Maryland (Newberry Library)
Found an error? Tell us. Last data update: October 4, 2026.