Maryland Counties
Complete list of all 24 counties in Maryland with population, area, median income, and county seats — plus a free printable blank map.
Labeled outline map of Maryland counties. Download a printable version in SVG, PNG, or PDF.
All 24 Maryland counties
| County | County Seat | Population ▼ | Area | Median Income | Cities |
|---|---|---|---|---|---|
| Montgomery | — | 1,076,754 | 491 mi² | $140,343 | 30 |
| Prince George's | — | 951,497 | 483 mi² | $105,293 | 26 |
| Baltimore | — | 848,900 | 81 mi² | $94,861 | 45 |
| Anne Arundel | — | 611,016 | 415 mi² | $126,039 | 33 |
| Baltimore | — | 565,466 | 81 mi² | $66,368 | 2 |
| Howard | — | 335,512 | 251 mi² | $154,200 | 20 |
| Frederick | — | 300,100 | 660 mi² | $128,365 | 26 |
| Harford | — | 262,768 | 437 mi² | $113,863 | 20 |
| Charles | — | 170,349 | 458 mi² | $125,334 | 21 |
| Washington | — | 159,858 | 458 mi² | $78,708 | 19 |
| Carroll | — | 158,322 | 448 mi² | $118,684 | 9 |
| St. Mary's | — | 113,480 | 357 mi² | $125,867 | 27 |
| Wicomico | — | 106,688 | 374 mi² | $75,504 | 17 |
| Cecil | — | 104,960 | 346 mi² | $93,963 | 16 |
| Calvert | — | 92,015 | 213 mi² | $138,887 | 13 |
How many counties does Maryland have?
Maryland has 24 counties covering 9,707 square miles and roughly 6,205,597 residents. The state was admitted to the Union in 1788 as the 7th state, and the current county boundaries reflect more than a century of administrative subdivision.
The largest county by land area is Frederick County at 660 square miles, home to about 300,100 residents. The most populous is Montgomery County with approximately 1,076,754 residents — a density of about 2,193 people per square mile.
At the other end of the scale, Somerset County has only about 23,082 residents.
Maryland’s capital is Annapolis, while the largest city is Baltimore — a common pattern in the United States, where many states placed their capitals in smaller, more central towns rather than their largest commercial hubs.
Related resources
Download a printable outline of Maryland’s county boundaries from our blank map of Maryland page — available in SVG, PNG, and PDF.
Use the What County Am I In? tool to detect which Maryland county a GPS location or address falls in, or the Address to County Lookup for batch input.
For demographic radius analysis, the Find ZIP Codes in Radius and Population Within Radius tools let you draw a circle around any Maryland address and see every ZIP code and the total population inside.
Two SimpleMapLab studies cover Maryland specifically: the 100-mile radius around Annapolis measures how much of the state lives within 100 miles of its capitol, and the loneliest town in Maryland ranks the state’s most isolated inhabited place. The county-counts blog post puts Maryland’s 24 counties in national context.
Frequently asked questions
Population and demographics are aggregated from ZIP-code-level US Census data via the SimpleMaps dataset. Countiesboundaries are from the US Atlas TopoJSON build of the Census Bureau’s TIGER/Line shapefiles. Land area is from the Census Gazetteer. State counts follow the US Census Bureau’s definition of counties and county-equivalents (50 states + DC = 3,143). All sources are public domain.