CountyAtlas

Maryland County Map — 23 Counties and 1 Independent City

All 24 of Maryland's counties, mapped from official U.S. Census boundaries with population, income, and unemployment for every one. Color the map by any measure, tap a county for its data, or download a print-ready copy.

Maryland CountiesFIPS 24
Allegany CountyAnne Arundel CountyBaltimore CountyCalvert CountyCaroline CountyCarroll CountyCecil CountyCharles CountyDorchester CountyFrederick CountyGarrett CountyHarford CountyHoward CountyKent CountyMontgomery CountyPrince George's CountyQueen Anne's CountySt. Mary's CountySomerset CountyTalbot CountyWashington CountyWicomico CountyWorcester CountyBaltimore cityBaltimoreFrederickGaithersburgBowieHagerstownAnnapolisSalisburyWestminsterEastonAberdeen Somerset  Baltimore  Frederick  Gaithersburg  Bowie  Hagerstown  Annapolis  Salisbury  Westminster  Easton  Aberdeen BaltimoreFrederickGaithersburgBowieHagerstownAnnapolisCollege ParkSalisburyWestminsterCumberlandEastonAberdeen Dorchester  St. Mary's  Worcester  Garrett  Charles  Somerset  Baltimore  Frederick  Gaithersburg  Bowie  Hagerstown  Annapolis  College Park  Salisbury  Westminster  Cumberland  Easton  Aberdeen BaltimoreFrederickGaithersburgRockvilleBowieHagerstownAnnapolisCollege ParkSalisburyWestminsterCumberlandEastonAberdeenElkton Dorchester  St. Mary's  Worcester  Charles  Somerset  Calvert  Howard  Baltimore  Frederick  Gaithersburg  Rockville  Bowie  Hagerstown  Annapolis  College Park  Salisbury  Westminster  Cumberland  Easton  Aberdeen  Elkton BaltimoreFrederickGaithersburgRockvilleBowieHagerstownAnnapolisCollege ParkSalisburyWestminsterCumberlandEastonAberdeenElkton Dorchester  St. Mary's  Worcester  Baltimore  Garrett  Charles  Somerset  Calvert  Caroline  Howard  Baltimore  Frederick  Gaithersburg  Rockville  Bowie  Hagerstown  Annapolis  College Park  Salisbury  Westminster  Cumberland  Easton  Aberdeen  Elkton 
Albers Equal Area ConicDatum WGS 84Census PEP V2025 · Census SAIPE 2024 · BLS LAUS September 2026, preliminary · Census TIGER 2026
CountyAtlasEdition
Maryland’s 23 counties and 1 independent city, projected equal-area. Hover over a county, or tap it, for its seat and key numbers; select it for all its data.
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Tap any county or independent city for its population, income, and more.

Maryland at a glance

Maryland’s 23 counties and 1 independent city, by the numbers

The table lists every county or independent city’s population, median household income, unemployment, density, and land area. Sort it by any column to find yours or rank them. A few patterns stand out:

  • Concentrated. Half of Maryland’s 6,265,347 residents live in just 4 of 24 counties and independent cities, and the 5 largest hold 64.9% of the total. calculated from Census PEP V2025
  • Income tracks poverty. The gap from richest to poorest runs 2.8×, and the 10 highest-income counties and independent cities average 6.4% in poverty against 14.5% for the 10 lowest. calculated from Census SAIPE 2024
  • The median county or independent city. Half of Maryland’s counties and independent cities have fewer than 111,912 residents, and half report a median household income below $88,683. calculated from Census PEP V2025 · Census SAIPE 2024
  • Lopsided density. Only 6 of 24 counties and independent cities are denser than Maryland’s statewide average of 645 people per square mile. calculated from Census PEP V2025 · Census TIGER 2026
Allegany County66,848$63,2154.5%158/sq mi422 sq miCumberland
Anne Arundel County603,380$127,0423.0%1,455/sq mi415 sq miAnnapolis
Baltimore city569,997$63,4514.6%7,041/sq mi81 sq miNone. An independent city, not part of any county.
Baltimore County847,650$87,8653.6%1,417/sq mi598 sq miTowson
Calvert County94,484$121,7983.1%443/sq mi213 sq miPrince Frederick
Caroline County34,116$72,5643.4%107/sq mi319 sq miDenton
Carroll County176,677$114,9272.7%395/sq mi448 sq miWestminster
Cecil County107,131$89,5013.5%309/sq mi346 sq miElkton
Charles County176,593$125,9853.9%386/sq mi458 sq miLa Plata
Dorchester County33,628$65,4764.0%62/sq mi541 sq miCambridge
Frederick County302,883$121,3803.1%458/sq mi661 sq miFrederick
Garrett County28,370$67,5533.3%44/sq mi649 sq miOakland
Harford County266,446$110,6653.1%610/sq mi437 sq miBel Air
Howard County339,183$149,9803.0%1,352/sq mi251 sq miEllicott City
Kent County19,565$75,8733.6%71/sq mi277 sq miChestertown
Montgomery County1,074,582$138,8703.2%2,179/sq mi493 sq miRockville
Prince George's County970,374$97,6344.0%2,011/sq mi483 sq miUpper Marlboro
Queen Anne's County54,448$112,6212.8%146/sq mi372 sq miCentreville
Somerset County24,973$53,0224.2%78/sq mi320 sq miPrincess Anne
St. Mary's County116,692$116,9693.0%325/sq mi359 sq miLeonardtown
Talbot County38,238$87,1213.3%142/sq mi269 sq miEaston
Washington County157,731$77,6323.6%345/sq mi458 sq miHagerstown
Wicomico County106,899$67,7863.6%286/sq mi374 sq miSalisbury
Worcester County54,459$81,7113.3%116/sq mi468 sq miSnow Hill

Click a column heading to sort all 24 counties and independent cities. A suppressed estimate (coefficient of variation ≥ 0.30) shows a marker, never a guess. County seats are from Wikidata (CC0), each validated to a Census place inside its county. Where Wikidata has none, the seat comes from the page cited for that county in the seat file, and where the table names no seat, it says why. See the methodology.

Download & print this Maryland map

Map of Maryland's 23 counties and 1 independent city on official U.S. Census boundaries, with major cities: Baltimore, Frederick, Gaithersburg, Rockville, Bowie, Hagerstown

Free, print-ready maps of all 24 Maryland counties on official U.S. Census boundaries, with no watermark. They are public domain (CC0).

  • Full map (counties and major cities): PNG · PDF
  • Blank outline to print and label yourself: PNG · PDF
  • Counties only, labeled, for reference: PNG · PDF

Maryland maps, colored by the data

Map of Maryland counties shaded by population, from official U.S. Census data
Population Map by County · Census PEP V2025
Map of Maryland counties shaded by median household income, from official U.S. Census data
Median Household Income Map by County · Census SAIPE 2024
Map of Maryland counties shaded by unemployment rate, from U.S. Bureau of Labor Statistics data
Unemployment Rate Map by County · BLS LAUS September 2026, preliminary

Cities in Maryland

Maryland has 156 incorporated cities, towns, and villages. The largest is Baltimore, an independent city, with 573,243 residents. Use the search on the map above to find any city and highlight the county or independent city it sits in.

Baltimoreindependent city573,243
FrederickFrederick County83,395
GaithersburgMontgomery County69,825
RockvilleMontgomery County67,671
BowiePrince George's County57,926
HagerstownWashington County43,665
AnnapolisAnne Arundel County40,720
College ParkPrince George's County34,540
SalisburyWicomico County33,285
LaurelPrince George's County29,798
GreenbeltPrince George's County24,678
HyattsvillePrince George's County20,966
WestminsterCarroll County20,445
CumberlandAllegany County18,804
Takoma ParkMontgomery County17,632
Easton (town)Talbot County17,308
AberdeenHarford County17,298
Elkton (town)Cecil County15,910
Havre de GraceHarford County14,994
New CarrolltonPrince George's County13,564
CambridgeDorchester County13,152
La Plata (town)Charles County10,683
Bel Air (town)Harford County10,585
Mount Airy (town)Carroll County +1 more (also Frederick County)9,805
Bladensburg (town)Prince George's County9,583
BrunswickFrederick County8,450
Mount RainierPrince George's County8,245
TaneytownCarroll County7,932
Riverdale Park (town)Prince George's County7,270
FrostburgAllegany County6,977
Ocean City (town)Worcester County6,903
Chesapeake Beach (town)Calvert County6,456
Walkersville (town)Frederick County6,414
GlenardenPrince George's County6,344
Thurmont (town)Frederick County6,254
Hampstead (town)Carroll County6,251
Cheverly (town)Prince George's County6,096
District HeightsPrince George's County5,891
FruitlandWicomico County5,801
Poolesville (town)Montgomery County5,764
Chestertown (town)Kent County5,594
Manchester (town)Carroll County5,439
Berlin (town)Worcester County5,232
Middletown (town)Frederick County5,014
Denton (town)Caroline County4,936
Leonardtown (town)St. Mary's County4,808
Centreville (town)Queen Anne's County4,761
Sykesville (town)Carroll County4,491
Seat PleasantPrince George's County4,489
Perryville (town)Cecil County4,447

The table shows the 50 most populous. Search the map above for the other 106.

A city can reach into more than one county or independent city. The table names the one its center falls in; “+N more” counts the others, from the Census Bureau’s count of each city by county or independent city part Census ACS 2020–2024 place parts. Some Maryland cities are independent cities: each is its own county-equivalent, outside any surrounding county, and the table marks them.

Which Maryland county is the richest, largest, most crowded? The answers

  • Maryland’s highest median household income is in Howard County ($149,980); the lowest is in Somerset County ($53,022). Census SAIPE 2024
  • Maryland’s most populous county is Montgomery County (1,074,582); the least populous is Kent County (19,565), a 55× spread. calculated from Census PEP V2025
  • Maryland’s largest county by land area is Frederick County (661 sq mi); the smallest is Baltimore city (81 sq mi). Census TIGER 2026
  • Maryland’s highest population density is in Baltimore city (7,041/sq mi); the lowest is in Garrett County (44/sq mi). calculated from Census PEP V2025 · Census TIGER 2026
  • Maryland’s highest poverty rate is in Somerset County (20.3%); the lowest is in Frederick County (5.3%). Census SAIPE 2024
  • In Maryland, unemployment is highest in Baltimore city (4.6%) and lowest in Carroll County (2.7%), for September 2026 (preliminary). BLS LAUS September 2026, preliminary
  • Maryland’s highest median age is in Talbot County (51.2); the lowest is in Baltimore city and Wicomico County (tied at 36.2). Census ACS 2020–2024
  • Maryland’s highest share of adults 25 and over with a bachelor’s degree or higher is in Howard County (64.5%); the lowest is in Caroline County (16.2%). Census ACS 2020–2024

Every figure is a current official estimate from the source named, never a crowd-sourced or copied value. Suppressed estimates (coefficient of variation ≥ 0.30) are omitted, never guessed. See the full methodology.

Maryland counties: common questions

How many counties are in Maryland?

Maryland has 23 counties and 1 independent city covering 9,711 sq mi and about 6.3M residents. Every one is on the map and in the table above.

What is the largest county in Maryland?

It depends on the measure. By land area it’s Frederick County (661 sq mi); by population it’s Montgomery County (1,074,582 residents).

What county is Baltimore in?

Baltimore, population 573,243, is an independent city, its own county-equivalent. Use the search on the map to find any Maryland city’s county.

What is the richest county in Maryland?

By median household income, Howard County is the richest at $149,980; the poorest is Somerset County at $53,022. Census SAIPE 2024

What is the most populous county in Maryland?

Montgomery County, with 1,074,582 residents, about 17.2% of Maryland’s people. That is 55× the least populous, Kent County (19,565).

Sources & vintages

Data current through .

By , BSc Physics, University of Ljubljana · How this site is made