Population of St. Mary's County, Maryland (County)

Map of Population by County Subdivision in St. Mary's County

Population Density Population by County Subdivision#1

Population per square mile of land (excluding water areas):
110/mi²260/mi²400/mi²540/mi²680/mi²820/mi²

Population Population by County Subdivision#2

Total population:
0k8k16k24k32k41k
Road Data ©OpenStreetMap

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Map of Population by Tract in St. Mary's County

Population Density Population by Tract#3

Population per square mile of land (excluding water areas):
120/mi²530/mi²940/mi²1,340/mi²1,750/mi²2,160/mi²

Population Population by Tract#4

Total population:
02,1004,2006,3008,50010,600
Road Data ©OpenStreetMap

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Map of Population by Block Group in St. Mary's County

Population Density Population by Block Group#5

Population per square mile of land (excluding water areas):
0/mi²1,500/mi²2,900/mi²4,300/mi²5,800/mi²7,300/mi²

Population Population by Block Group#6

Total population:
01,3002,6003,9005,3006,600
Road Data ©OpenStreetMap

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Population by Place in St. Mary's County

There are 9 places in St. Mary's County. This section compares all 9 of those to each other.

Total Population by Place#7

Scope: population of selected places in St. Mary's County
0k2k4k6k8k10k12k#Lexington ParkLexington PkCaliforniaLeonardtownGolden BeachCharlotte HallMechanicsvillePiney PointTall TimbersSt. George IslandSt. George Is12,678.00000012,678.00000012.68k112,386.00000012,386.00000012.39k23,539.0000003,539.0000003.54k33,307.0000003,307.0000003.31k41,817.0000001,817.0000001.82k51,715.0000001,715.0000001.72k6810.000000810.0000000.81k7324.000000324.0000000.32k8229.000000229.0000000.23k9
# rank of place out of 9 by population

Population Density by Place#8

People per square mile (excluding waters).
Scope: population of selected places in St. Mary's County
05001,0001,5002,000#Lexington ParkLexington PkCaliforniaLeonardtownGolden BeachPiney PointCharlotte HallSt. George IslandSt. George IsMechanicsvilleTall Timbers2,254.6225242,254.6225242,2551969.311409969.3114099692927.211416927.2114169273872.063631872.0636318724527.687927527.6879275285358.909715358.9097153596340.458679340.4586793407330.430753330.4307533308235.613581235.6135812369
# rank of place out of 9 by population density

Population by County Subdivision in St. Mary's County

There are 9 county subdivisions in St. Mary's County. This section compares all 9 of those to each other.

Total Population by County Subdivision#9

Scope: population of selected county subdivisions in St. Mary's County
0k5k10k15k20k25k30k35k40k#District 8:Bay8, BayDistrict 3:Leonardtown3, LeonardtownDistrict 5:Mechanicsville5, MechanicsvilleDistrict 6:Patuxent6, PatuxentDistrict 4:Chaptico4, ChapticoDistrict 2:Valley Lee2, Vly LeeDistrict 1:St. Inigoes1, St. InigoesDistrict 7:Milestown7, MilestownDistrict 9:St. George Island9, St. George Is40,455.00000040,455.00000040.46k116,870.00000016,870.00000016.87k213,418.00000013,418.00000013.42k312,590.00000012,590.00000012.59k410,285.00000010,285.00000010.29k57,071.0000007,071.0000007.07k66,735.0000006,735.0000006.74k73,022.0000003,022.0000003.02k8229.000000229.0000000.23k9
# rank of county subdivision out of 9 by population

Population Density by County Subdivision#10

People per square mile (excluding waters).
Scope: population of selected county subdivisions in St. Mary's County
0100200300400500600700800#District 8:Bay8, BayDistrict 9:St. George Island9, St. George IsDistrict 5:Mechanicsville5, MechanicsvilleDistrict 6:Patuxent6, PatuxentDistrict 3:Leonardtown3, LeonardtownDistrict 2:Valley Lee2, Vly LeeDistrict 4:Chaptico4, ChapticoDistrict 1:St. Inigoes1, St. InigoesDistrict 7:Milestown7, Milestown818.274258818.2742588181334.426617334.4266173342301.481738301.4817383013267.066694267.0666942674265.106243265.1062432655206.057065206.0570652066203.113879203.1138792037161.648136161.6481361628119.085309119.0853091199
# rank of county subdivision out of 9 by population density

Population by County in Maryland

There are 24 counties in Maryland. This section compares St. Mary's County to all of the counties in Maryland.

Total Population by County#11

Scope: population of St. Mary's County and selected other counties in Maryland
0k200k400k600k800k1,000k#Montgomery CountyMontgomeryPrince George's CountyPrince George'sBaltimore CountyBaltimoreBaltimore CityBaltimoreAnne Arundel CountyAnne ArundelHoward CountyHowardHarford CountyHarfordFrederick CountyFrederickCarroll CountyCarrollCharles CountyCharlesWashington CountyWashingtonSt. Mary's CountySt. Mary'sCecil CountyCecilWicomico CountyWicomicoCalvert CountyCalvertAllegany CountyAlleganyWorcester CountyWorcesterQueen Anne's CountyQueen Anne'sTalbot CountyTalbotCaroline CountyCarolineDorchester CountyDorchesterGarrett CountyGarrettSomerset CountySomersetKent CountyKent1,026,371.0000001,026,371.0000001,026.37k1897,693.000000897,693.000000897.69k2825,666.000000825,666.000000825.67k3621,000.000000621,000.000000621.00k4559,737.000000559,737.000000559.74k5308,447.000000308,447.000000308.45k6249,776.000000249,776.000000249.78k7243,465.000000243,465.000000243.47k8167,535.000000167,535.000000167.54k9154,357.000000154,357.000000154.36k10149,571.000000149,571.000000149.57k11110,675.000000110,675.000000110.68k12102,175.000000102,175.000000102.18k13101,527.000000101,527.000000101.53k1490,527.00000090,527.00000090.53k1573,060.00000073,060.00000073.06k1651,441.00000051,441.00000051.44k1748,712.00000048,712.00000048.71k1837,668.00000037,668.00000037.67k1932,653.00000032,653.00000032.65k2032,451.00000032,451.00000032.45k2129,677.00000029,677.00000029.68k2225,899.00000025,899.00000025.90k2319,819.00000019,819.00000019.82k24
# rank of county out of 24 by population

Population Density by County#12

People per square mile (excluding waters).
Scope: population of St. Mary's County and selected other counties in Maryland
0k1k2k3k4k5k6k7k#Baltimore CityBaltimoreMontgomery CountyMontgomeryPrince George's CountyPrince George'sBaltimore CountyBaltimoreAnne Arundel CountyAnne ArundelHoward CountyHowardHarford CountyHarfordCalvert CountyCalvertCarroll CountyCarrollFrederick CountyFrederickCharles CountyCharlesWashington CountyWashingtonSt. Mary's CountySt. Mary'sCecil CountyCecilWicomico CountyWicomicoAllegany CountyAlleganyTalbot CountyTalbotQueen Anne's CountyQueen Anne'sWorcester CountyWorcesterCaroline CountyCarolineSomerset CountySomersetKent CountyKentDorchester CountyDorchesterGarrett CountyGarrett7,671.9868697,671.9868697.67k12,081.8544912,081.8544912.08k21,859.6273321,859.6273321.86k31,379.8768581,379.8768581.38k41,349.1303481,349.1303481.35k51,229.1453301,229.1453301.23k6571.436231571.4362310.57k7424.616201424.6162010.42k8374.295975374.2959750.37k9368.635724368.6357240.37k10337.182527337.1825270.34k11326.740942326.7409420.33k12309.665871309.6658710.31k13295.067414295.0674140.30k14271.159948271.1599480.27k15172.245969172.2459690.17k16140.268831140.2688310.14k17131.059151131.0591510.13k18109.851581109.8515810.11k19102.218961102.2189610.10k2081.00330081.0033000.08k2171.54035171.5403510.07k2260.01084060.0108400.06k2345.86003145.8600310.05k24
# rank of county out of 24 by population density

Population by County in the United States

There are 3,142 counties in the United States. This section compares St. Mary's County to the 50 most populous counties in the United States. The least populous of the compared counties has a population of 941,618.

Total Population by County#13

Scope: population of St. Mary's County and selected other counties in the United States
0M2M4M6M8M10M#Los Angeles CountyLos AngelesCook CountyCookHarris CountyHarrisMaricopa CountyMaricopaSan Diego CountySan DiegoOrange CountyOrangeMiami-Dade CountyMiami-DadeKings CountyKingsDallas CountyDallasRiverside CountyRiversideQueens CountyQueensSan Bernardino CountySan BernardinoKing CountyKingClark CountyClarkTarrant CountyTarrantSanta Clara CountySanta ClaraBroward CountyBrowardBexar CountyBexarWayne CountyWayneNew York CountyNew YorkAlameda CountyAlamedaMiddlesex CountyMiddlesexPhiladelphia CountyPhiladelphiaSuffolk CountySuffolkSacramento CountySacramentoBronx CountyBronxPalm Beach CountyPalm BeachNassau CountyNassauHillsborough CountyHillsboroughCuyahoga CountyCuyahogaOrange CountyOrangeOakland CountyOaklandFranklin CountyFranklinAllegheny CountyAlleghenyHennepin CountyHennepinTravis CountyTravisFairfax CountyFairfaxContra Costa CountyContra CostaSalt Lake CountySalt LakeMontgomery CountyMontgomeryMecklenburg CountyMecklenburgPima CountyPimaSt. Louis CountySt. LouisWake CountyWakeFulton CountyFultonHonolulu CountyHonoluluWestchester CountyWestchesterFresno CountyFresnoMilwaukee CountyMilwaukeeFairfield CountyFairfieldSt. Mary's CountySt. Mary's10,057,155.00000010,057,155.00000010.06M15,227,575.0000005,227,575.0000005.23M24,434,257.0000004,434,257.0000004.43M34,088,549.0000004,088,549.0000004.09M43,253,356.0000003,253,356.0000003.25M53,132,211.0000003,132,211.0000003.13M62,664,418.0000002,664,418.0000002.66M72,606,852.0000002,606,852.0000002.61M82,513,054.0000002,513,054.0000002.51M92,323,892.0000002,323,892.0000002.32M102,310,011.0000002,310,011.0000002.31M112,106,754.0000002,106,754.0000002.11M122,079,550.0000002,079,550.0000002.08M132,070,153.0000002,070,153.0000002.07M141,947,529.0000001,947,529.0000001.95M151,885,056.0000001,885,056.0000001.89M161,863,780.0000001,863,780.0000001.86M171,858,699.0000001,858,699.0000001.86M181,767,593.0000001,767,593.0000001.77M191,634,989.0000001,634,989.0000001.63M201,605,217.0000001,605,217.0000001.61M211,567,610.0000001,567,610.0000001.57M221,559,938.0000001,559,938.0000001.56M231,498,130.0000001,498,130.0000001.50M241,479,300.0000001,479,300.0000001.48M251,436,785.0000001,436,785.0000001.44M261,398,757.0000001,398,757.0000001.40M271,356,801.0000001,356,801.0000001.36M281,323,059.0000001,323,059.0000001.32M291,258,710.0000001,258,710.0000001.26M301,256,055.0000001,256,055.0000001.26M311,235,215.0000001,235,215.0000001.24M321,232,118.0000001,232,118.0000001.23M331,230,360.0000001,230,360.0000001.23M341,209,265.0000001,209,265.0000001.21M351,148,176.0000001,148,176.0000001.15M361,132,887.0000001,132,887.0000001.13M371,107,925.0000001,107,925.0000001.11M381,092,518.0000001,092,518.0000001.09M391,026,371.0000001,026,371.0000001.03M401,011,774.0000001,011,774.0000001.01M411,003,338.0000001,003,338.0000001.00M421,000,560.0000001,000,560.0000001.00M43998,576.000000998,576.0000001.00M44996,757.000000996,757.0000001.00M45986,999.000000986,999.0000000.99M46969,229.000000969,229.0000000.97M47963,160.000000963,160.0000000.96M48955,306.000000955,306.0000000.96M49941,618.000000941,618.0000000.94M50110,675.000000110,675.0000000.11M
# rank of county out of 50 by population

Population Density by County#14

People per square mile (excluding waters).
Scope: population of St. Mary's County and selected other counties in the United States
0k10k20k30k40k50k60k70k#New York CountyNew YorkKings CountyKingsBronx CountyBronxQueens CountyQueensPhiladelphia CountyPhiladelphiaCook CountyCookNassau CountyNassauOrange CountyOrangeMilwaukee CountyMilwaukeeFairfax CountyFairfaxWayne CountyWayneDallas CountyDallasCuyahoga CountyCuyahogaHarris CountyHarrisLos Angeles CountyLos AngelesFranklin CountyFranklinTarrant CountyTarrantWestchester CountyWestchesterHennepin CountyHennepinAlameda CountyAlamedaMontgomery CountyMontgomerySt. Louis CountySt. LouisMecklenburg CountyMecklenburgMiddlesex CountyMiddlesexFulton CountyFultonAllegheny CountyAlleghenyHonolulu CountyHonoluluSuffolk CountySuffolkBroward CountyBrowardSacramento CountySacramentoContra Costa CountyContra CostaFairfield CountyFairfieldBexar CountyBexarSalt Lake CountySalt LakeSanta Clara CountySanta ClaraOakland CountyOaklandMiami-Dade CountyMiami-DadeOrange CountyOrangeHillsborough CountyHillsboroughWake CountyWakeTravis CountyTravisKing CountyKingSan Diego CountySan DiegoPalm Beach CountyPalm BeachMaricopa CountyMaricopaRiverside CountyRiversideSt. Mary's CountySt. Mary'sClark CountyClarkFresno CountyFresnoPima CountyPimaSan Bernardino CountySan Bernardino72,167.60597972,167.60597972.17k137,340.67621837,340.67621837.34k234,167.96880134,167.96880134.17k321,237.94747821,237.94747821.24k411,625.88366911,625.88366911.63k55,531.8762675,531.8762675.53k64,763.9163794,763.9163794.76k73,961.7034453,961.7034453.96k83,953.6841943,953.6841943.95k92,898.4456972,898.4456972.90k102,888.1522602,888.1522602.89k112,878.4220552,878.4220552.88k122,753.3818582,753.3818582.75k132,600.9540812,600.9540812.60k142,478.2396272,478.2396272.48k152,314.3614822,314.3614822.31k162,254.9978792,254.9978792.25k172,251.3192932,251.3192932.25k182,184.2050692,184.2050692.18k192,171.8733742,171.8733742.17k202,081.8544912,081.8544912.08k211,970.4926601,970.4926601.97k221,932.3437311,932.3437311.93k231,917.0752881,917.0752881.92k241,892.4081641,892.4081641.89k251,685.2478291,685.2478291.69k261,643.3391511,643.3391511.64k271,643.1276081,643.1276081.64k281,544.1986571,544.1986571.54k291,533.0483871,533.0483871.53k301,532.9159351,532.9159351.53k311,506.6615071,506.6615071.51k321,499.0984171,499.0984171.50k331,472.2923611,472.2923611.47k341,459.9180661,459.9180661.46k351,423.9503141,423.9503141.42k361,403.3126861,403.3126861.40k371,390.4953151,390.4953151.39k381,296.7175361,296.7175361.30k391,196.1706231,196.1706231.20k401,157.6775431,157.6775431.16k41982.963629982.9636290.98k42773.385727773.3857270.77k43710.067520710.0675200.71k44444.446561444.4465610.44k45322.481032322.4810320.32k46309.665871309.6658710.31k262.321925262.3219250.26k47161.637031161.6370310.16k48109.210256109.2102560.11k49105.036867105.0368670.11k50
# rank of county out of 50 by population density

Definitions

This page reports on the population distribution in St. Mary's County, both in terms of raw head counts, and in terms of population density per square mile.

  • Population: count of all residents of the given entity at the time of the survey, excluding visitors
  • Population Density: population divided by the total land area of the entity (i.e., excluding water areas contained in the entity)

For additional information about the data presented on this site, including our sources, please see the About Page.

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Principal Unincorporated Places:
Lexington Park, California
Districts:
1, St. Inigoes, 2, Valley Lee, 3, Leonardtown, 4, Chaptico, 5, Mechanicsville, 6, Patuxent, 7, Milestown, 8, Bay, 9, St. George Island
Towns:
Leonardtown
Unincorporated Places:
California, Charlotte Hall, Golden Beach, Lexington Park, Mechanicsville, Piney Point, St. George Island, Tall Timbers
ZIP Codes:
20606, 20609, 20618, 20619, 20620, 20621, 20622, 20624, 20626, 20628, 20630, 20634, 20636, 20650, 20653, 20659, 20660, 20667, 20670, 20674, 20680, 20684, 20686, 20687, 20690, 20692
Unified School District:
St. Marys County
Congressional District:
MD-5
State Senate District:
MD-29
State Legislative Subdistricts:
MD-29A, MD-29B, MD-29C
Neighboring Counties:
Calvert, Charles, Dorchester, Northumberland, Somerset, Westmoreland
Nearby Counties:
Caroline, Essex, King George, King William, King and Queen, Lancaster, Middlesex, Prince George's, Richmond, Talbot