State 24 · MD

Maryland county map

Maryland has 24 counties. Frederick County is the largest by land at 661 square miles, and Montgomery County is the most populous with 1,082,273 residents.

Population 2024
6,263,220
#18 of 51
Land area
9,711 sq mi
#42 of 51
Density
645.0 / sq mi
#6 of 51
Counties
24
Capital: Annapolis
N
Annapolis 38.98° N, 76.49° W

Map of all 24 counties in Maryland

Every county is labeled on Census 2024 boundaries. Download it as a PDF to print, a PNG, or an editable SVG. For blank, colored or city versions, see the printable Maryland map sheets.

AlleganyAnne ArundelBaltimoreCalvertCarolineCarrollCecilCharlesDorchesterFrederickGarrettHarfordHowardKentMontgomeryPrince George'sQueen Anne'sSt. Mary'sSomersetTalbotWashingtonWicomicoWorcesterBaltimore cityMaryland county map. Online Map Tools (onlinemaptools.com), Census 2024 boundaries, free to reuse with credit.
24 units labeled. The orange dot marks the capital.

Maryland population and land area

Maryland had 6,263,220 residents in the Census Vintage 2024 estimates, the sum of its counties. That ranks 18th of the 50 states and DC. Its 9,711 square miles of land rank 42nd. Maryland averages 645.0 people per square mile of land, 6.7 times the national figure of 96.3. By density it ranks 6th.

Population, 2024
6,263,22018th of 51
Land area
9,711 sq mi42nd of 51
Density
645.0 per sq mi6th of 51
Number of counties
24
Capital
Annapolis38.979° N, 76.491° W
State FIPS code
24

Maryland counties by population, density and income

Each shape is shaded by quintile, darker for higher values. Switch the measure above the map. Select a shape to open that county's page. The pin marks the capital, Annapolis.

Caroline County: 107Washington County: 343Allegany County: 159Carroll County: 396Baltimore County: 1,425Baltimore city: 7,020Anne Arundel County: 1,452Cecil County: 307Dorchester County: 61Garrett County: 44Harford County: 607St. Mary's County: 325Talbot County: 142Worcester County: 116Charles County: 381Frederick County: 453Wicomico County: 284Somerset County: 79Howard County: 1,354Calvert County: 445Kent County: 71Prince George's County: 2,003Montgomery County: 2,195Queen Anne's County: 144
Density
  1. < 107
  2. 107+
  3. 284+
  4. 381+
  5. 1,354+
no data

Largest county in Maryland by land area

Frederick County ranks first at 661 square miles and Baltimore city last at 81 square miles. The top value is 8.2 times the bottom one.

  1. 01Frederick County661
  2. 02Garrett County649
  3. 03Baltimore County598
  4. 04Dorchester County541
  5. 05Montgomery County493
  6. 06Prince George's County483
  7. 07Worcester County468
  8. 08Charles County458
  9. 09Washington County458
  10. 10Carroll County448

Most populous county in Maryland

Montgomery County ranks first at 1,082,273 residents and Kent County last at 19,557 residents. The top value is 55 times the bottom one.

  1. 01Montgomery County1,082,273
  2. 02Prince George's County966,629
  3. 03Baltimore County852,425
  4. 04Anne Arundel County602,350
  5. 05Baltimore city568,271
  6. 06Howard County339,668
  7. 07Frederick County299,317
  8. 08Harford County265,514
  9. 09Carroll County177,108
  10. 10Charles County174,478

Least populous county in Maryland

The smallest populations, fewest first. Estimates for small counties carry more uncertainty than those for large ones.

  1. 01Kent County19,557
  2. 02Somerset County25,241
  3. 03Garrett County28,393
  4. 04Dorchester County33,138
  5. 05Caroline County34,248
Log scale, so small counties stay visible next to the largest.

Most densely populated county in Maryland

Baltimore city ranks first at 7,020.0 people per square mile and Garrett County last at 43.7 people per square mile. The gap is more than a hundredfold.

  1. 01Baltimore city7,020.0
  2. 02Montgomery County2,194.6
  3. 03Prince George's County2,003.0
  4. 04Anne Arundel County1,452.1
  5. 05Baltimore County1,424.6
  6. 06Howard County1,353.5
  7. 07Harford County607.4
  8. 08Frederick County453.1
  9. 09Calvert County445.2
  10. 10Carroll County395.7
People per square mile of land, log scale.

Highest median household income in Maryland

Howard County ranks first at $140,113 and Somerset County last at $51,841. The top value is 2.7 times the bottom one.

  1. 01Howard County$140,113
  2. 02Montgomery County$125,076
  3. 03Calvert County$124,486
  4. 04Anne Arundel County$116,956
  5. 05Frederick County$114,089
  6. 06Carroll County$113,885
  7. 07Queen Anne's County$112,527
  8. 08Charles County$105,141
  9. 09Harford County$104,553
  10. 10St. Mary's County$102,345

Towns and cities in Maryland

The Census Vintage 2024 subcounty estimates list 100 incorporated places in Maryland with 1,000 or more residents, holding 1,540,686 people together, or 25% of the state total. 46 of them have 5,000 or more. The northernmost is Emmitsburg at 39.705° N and the southernmost is Crisfield at 37.976° N. Among places of 5,000+, Brunswick grew fastest from July 2020 to July 2024, by 15.6%.

  1. 01Baltimore568,271
  2. 02Frederick89,537
  3. 03Gaithersburg70,686
  4. 04Rockville68,417
  5. 05Bowie58,421
  6. 06Hagerstown43,909
  7. 07Annapolis40,689
  8. 08College Park34,667
  9. 09Salisbury33,616
  10. 10Laurel30,238
  11. 11Greenbelt24,843
  12. 12Hyattsville21,052
Largest incorporated places, Vintage 2024 estimates.

Annapolis, the capital

97.9% of Maryland's place population, 1,507,801 of 1,540,686 people, lives in places within 100 miles of Annapolis. That ranks 10th of 51 for how central the capital is.

See all states in the capital radius ranking and the most remote towns ranking. Sunrise and sunset times for Annapolis, month by month, are on the Annapolis daylight page.

States bordering Maryland

Maryland borders 5 states or districts. The nearest neighboring capital is Washington, 30 miles W of Annapolis in a straight line.

UTM zones in Maryland

The internal points of Maryland's counties fall in UTM zones 17, 18. Zones are 6 degrees of longitude wide, numbered from 180° W: zone = floor((longitude + 180) / 6) + 1. Because Maryland spans 2 zones, no single UTM zone covers the whole state.

All 24 counties in Maryland

Sort by any column. The small orange number marks the top 3 in the state by population.

FIPS
24031Montgomery County1,082,273#14932,194.6$125,076
24033Prince George's County966,629#24832,003.0$97,171
24005Baltimore County852,425#35981,424.6$86,807
24003Anne Arundel County602,3504151,452.1$116,956
24510Baltimore city568,271817,020.0$58,616
24027Howard County339,6682511,353.5$140,113
24021Frederick County299,317661453.1$114,089
24025Harford County265,514437607.4$104,553
24013Carroll County177,108448395.7$113,885
24017Charles County174,478458381.1$105,141
24043Washington County157,228458343.5$71,685
24037St. Mary's County116,469359324.8$102,345
24045Wicomico County106,329374284.0$70,975
24015Cecil County106,305346307.0$87,592
24009Calvert County94,913213445.2$124,486
24001Allegany County67,097422158.9$54,759
24047Worcester County54,337468116.0$75,459
24035Queen Anne's County53,688372144.5$112,527
24041Talbot County38,244269142.4$80,371
24011Caroline County34,248319107.2$63,491
24019Dorchester County33,13854161.3$63,087
24023Garrett County28,39364943.7$65,991
24039Somerset County25,24132078.9$51,841
24029Kent County19,55727770.6$69,781

Download all 24 counties as CSV

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 Gazetteer, places
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.