Age and Sex in Fairfield County, Connecticut (County)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the counties in Connecticut.
Scope: population of Connecticut, Fairfield County, and other counties in Connecticut
Fairfield County
Connecticut
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0.0%0.5%1.0%1.5%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-421,12621.1k2.244%2.24%18,57318.6k1.972%1.97%22,87422.9k2.429%2.43%30,21730.2k3.209%3.21%23,61723.6k2.508%2.51%19,02719.0k2.021%2.02%29,89129.9k3.174%3.17%24,33924.3k2.585%2.58%67,37867.4k7.156%7.16%75,20875.2k7.987%7.99%72,91772.9k7.744%7.74%64,56464.6k6.857%6.86%57,75357.8k6.133%6.13%56,13256.1k5.961%5.96%52,77652.8k5.605%5.60%34,57634.6k3.672%3.67%11,44511.4k1.215%1.22%10,75010.8k1.142%1.14%26,44926.4k2.809%2.81%40,92840.9k4.347%4.35%64,74864.7k6.876%6.88%62,49162.5k6.637%6.64%53,83953.8k5.718%5.72%

Age and Sex#2

Percentage in each age cohort per year of age.1
Scope: population of Connecticut and Fairfield County
Female Male
Connecticut
Fairfield County
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%Senior2Older Adult3Younger Adult4College5Children6-0.170723%-0.058086%-0.184428%-0.060766%-0.228808%0.23%0.170723%0.184428%0.170723%0.17%135,434135k14.383%14.4%-0.682829%-0.054438%-0.683656%-0.043723%-0.737267%0.74%0.682829%0.683656%0.682829%0.68%334,297334k35.502%35.5%-0.587157%-0.601648%-0.587157%0.59%0.587157%0.012986%0.601648%0.012671%0.600143%0.60%201,237201k21.371%21.4%-0.637413%-0.712073%-0.637413%0.64%0.637413%0.016673%0.712073%0.028730%0.654087%0.65%48,64448.6k5.166%5.17%-0.640057%-0.585394%-0.640057%0.64%0.640057%0.029724%0.585394%0.026922%0.669781%0.67%222,006222k23.577%23.6%

Detailed Age and Sex#3

Percentage in each age cohort per year of age.1
Scope: population of Connecticut and Fairfield County
Female Male
Connecticut
Fairfield County
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-0.047020%-0.046184%-0.049811%-0.053515%-0.093204%0.09%0.047020%0.049811%0.047020%0.05%21,12621.1k2.244%2.24%-0.156709%-0.081073%-0.160599%-0.077557%-0.237782%0.24%0.156709%0.160599%0.156709%0.16%18,57318.6k1.972%1.97%-0.209937%-0.065972%-0.221436%-0.067576%-0.275908%0.28%0.209937%0.221436%0.209937%0.21%22,87422.9k2.429%2.43%-0.288695%-0.064421%-0.321850%-0.059857%-0.353116%0.35%0.288695%0.321850%0.288695%0.29%30,21730.2k3.209%3.21%-0.386285%-0.063472%-0.430664%-0.060238%-0.449758%0.45%0.386285%0.430664%0.386285%0.39%23,61723.6k2.508%2.51%-0.479069%-0.052197%-0.515512%-0.062838%-0.531266%0.53%0.479069%0.515512%0.479069%0.48%19,02719.0k2.021%2.02%-0.510433%-0.037276%-0.564793%-0.050949%-0.547710%0.55%0.510433%0.564793%0.510433%0.51%29,89129.9k3.174%3.17%-0.612616%-0.067172%-0.636632%-0.066837%-0.679787%0.68%0.612616%0.636632%0.612616%0.61%24,33924.3k2.585%2.58%-0.700241%-0.030628%-0.719133%-0.031834%-0.730870%0.73%0.700241%0.719133%0.700241%0.70%67,37867.4k7.156%7.16%-0.770950%-0.055521%-0.764661%-0.045584%-0.826471%0.83%0.770950%0.764661%0.770950%0.77%75,20875.2k7.987%7.99%-0.747224%-0.054311%-0.712540%-0.042881%-0.801535%0.80%0.747224%0.712540%0.747224%0.75%72,91772.9k7.744%7.74%-0.644423%-0.082496%-0.628417%-0.041014%-0.726919%0.73%0.644423%0.628417%0.644423%0.64%64,56464.6k6.857%6.86%-0.605553%-0.569291%-0.013604%-0.605553%0.61%0.605553%0.015569%0.569291%0.621122%0.62%57,75357.8k6.133%6.13%-0.589029%-0.014188%-0.603884%-0.008064%-0.603217%0.60%0.589029%0.603884%0.589029%0.59%56,13256.1k5.961%5.96%-0.552814%-0.601242%-0.552814%0.55%0.552814%0.015335%0.601242%0.025392%0.568150%0.57%52,77652.8k5.605%5.60%-0.586968%-0.616411%-0.586968%0.59%0.586968%0.050056%0.616411%0.069824%0.637024%0.64%34,57634.6k3.672%3.67%-0.606828%-0.673137%-0.606828%0.61%0.606828%0.001805%0.673137%0.052556%0.608633%0.61%11,44511.4k1.215%1.22%-0.557763%-0.712930%-0.557763%0.56%0.557763%0.026125%0.712930%0.011202%0.583889%0.58%10,75010.8k1.142%1.14%-0.692531%-0.731113%-0.692531%0.69%0.692531%0.019382%0.731113%0.025581%0.711913%0.71%26,44926.4k2.809%2.81%-0.704603%-0.659186%-0.704603%0.70%0.704603%0.039648%0.659186%0.035372%0.744251%0.74%40,92840.9k4.347%4.35%-0.674180%-0.623413%-0.674180%0.67%0.674180%0.026890%0.623413%0.026902%0.701070%0.70%64,74864.7k6.876%6.88%-0.646589%-0.572975%-0.646589%0.65%0.646589%0.034133%0.572975%0.027537%0.680722%0.68%62,49162.5k6.637%6.64%-0.560673%-0.515520%-0.560673%0.56%0.560673%0.022196%0.515520%0.021256%0.582869%0.58%53,83953.8k5.718%5.72%

Detailed Sex Ratio#4

Percentage more males or females in selected age cohorts.
Scope: population of Connecticut and Fairfield County
More Females More Males
Connecticut
Fairfield County
100%50%0%M:FFM85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-98.221344%-107.437063%-98.221344%98.2%0.5040.5066.468%66.5%33.532%33.5%-51.734888%-48.292615%-51.734888%51.7%0.6590.6660.276%60.3%39.724%39.7%-31.424524%-30.516964%-31.424524%31.4%0.7610.7656.789%56.8%43.211%43.2%-22.314597%-18.597725%-22.314597%22.3%0.8180.8255.019%55.0%44.981%45.0%-16.431452%-13.987145%-16.431452%16.4%0.8590.8653.796%53.8%46.204%46.2%-10.895589%-12.189519%-10.895589%10.9%0.9020.9052.583%52.6%47.417%47.4%-7.302864%-9.020788%-7.302864%7.3%0.9320.9351.761%51.8%48.239%48.2%-10.964722%-10.498556%-10.964722%11.0%0.9010.9052.599%52.6%47.401%47.4%-4.373938%-4.426775%-4.373938%4.4%0.9580.9651.070%51.1%48.930%48.9%-7.201697%-5.961283%-7.201697%7.2%0.9330.9351.738%51.7%48.262%48.3%-7.268334%-6.017990%-7.268334%7.3%0.9320.9351.753%51.8%48.247%48.2%-12.801582%-6.526482%-12.801582%12.8%0.8870.8953.008%53.0%46.992%47.0%-2.389693%2.571028%2.571028%2.6%1.0261.0349.365%49.4%50.635%50.6%-2.408770%-1.335438%-2.408770%2.4%0.9760.9850.595%50.6%49.405%49.4%2.774042%4.223211%2.774042%2.8%1.0281.0349.316%49.3%50.684%50.7%8.527833%11.327436%8.527833%8.5%1.0851.0947.955%48.0%52.045%52.0%0.297515%7.807584%0.297515%0.3%1.0031.0049.926%49.9%50.074%50.1%4.683930%1.571295%4.683930%4.7%1.0471.0548.856%48.9%51.144%51.1%2.798651%3.498942%2.798651%2.8%1.0281.0349.310%49.3%50.690%50.7%5.627010%5.365950%5.627010%5.6%1.0561.0648.632%48.6%51.368%51.4%3.988532%4.315293%3.988532%4.0%1.0401.0449.022%49.0%50.978%51.0%5.278891%4.806046%5.278891%5.3%1.0531.0548.714%48.7%51.286%51.3%3.958783%4.123288%3.958783%4.0%1.0401.0449.030%49.0%50.970%51.0%

Map of Age Cohorts by County Subdivision in Fairfield County

Children Age Cohorts by County Subdivision#5

Percentage of population aged 0 to 17 (%):
18.8%21.6%24.5%27.3%30.2%33.1%

College Age Cohorts by County Subdivision#6

Percentage of population aged 18 to 21 (%):
2.9%4.1%5.3%6.5%7.8%9.0%

20s Age Cohorts by County Subdivision#7

Percentage of population aged 22 to 29 (%):
2.4%4.7%6.9%9.2%11.4%13.7%

30s Age Cohorts by County Subdivision#8

Percentage of population aged 30 to 39 (%):
4.9%7.2%9.5%11.8%14.1%16.5%

40s Age Cohorts by County Subdivision#9

Percentage of population aged 40 to 49 (%):
12.8%13.7%14.6%15.4%16.3%17.2%

50s Age Cohorts by County Subdivision#10

Percentage of population aged 50 to 59 (%):
11.9%14.2%16.4%18.6%20.8%23.1%

60s Age Cohorts by County Subdivision#11

Percentage of population aged 60 to 69 (%):
8.3%9.6%10.9%12.1%13.4%14.7%

70s Age Cohorts by County Subdivision#12

Percentage of population aged 70 to 79 (%):
3.9%5.3%6.8%8.2%9.6%11.0%

80+ Age Cohorts by County Subdivision#13

Percentage of population aged 80 and older (%):
2.2%3.0%3.8%4.6%5.4%6.2%
Road Data ©OpenStreetMap

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Map of Age Cohorts by Tract in Fairfield County

Children Age Cohorts by Tract#14

Percentage of population aged 0 to 17 (%):
0%10%20%30%39%50%

College Age Cohorts by Tract#15

Percentage of population aged 18 to 21 (%):
0%6%13%19%25%32%

20s Age Cohorts by Tract#16

Percentage of population aged 22 to 29 (%):
0%7%13%19%24%31%

30s Age Cohorts by Tract#17

Percentage of population aged 30 to 39 (%):
2%9%15%21%27%34%

40s Age Cohorts by Tract#18

Percentage of population aged 40 to 49 (%):
4.4%9.2%14.0%18.8%23.6%28.5%

50s Age Cohorts by Tract#19

Percentage of population aged 50 to 59 (%):
4.6%8.7%12.7%16.7%20.7%24.7%

60s Age Cohorts by Tract#20

Percentage of population aged 60 to 69 (%):
1.9%5.4%8.9%12.4%15.9%19.4%

70s Age Cohorts by Tract#21

Percentage of population aged 70 to 79 (%):
0.0%2.6%5.2%7.8%10.4%13.1%

80+ Age Cohorts by Tract#22

Percentage of population aged 80 and older (%):
0.0%3.5%7.1%10.6%14.2%17.8%
Road Data ©OpenStreetMap

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Age Cohorts by Place in Fairfield County

There are 23 places in Fairfield County. This section compares all 23 of those to each other, Fairfield County, and other entities that contain or substantially overlap with Fairfield County.

Children by Place#23

Percentage of population aged 0 to 17 (%):
Scope: population of Fairfield County, selected places in Fairfield County, and entities that contain Fairfield County
0%10%20%30%Count#Old GreenwichDarienRiversideCannondaleRidgefieldGeorgetownNewtownWestportCos CobTrumbullByramBridgeportBridgeport, Stamford, and Norwalk Metro AreaBridgeportFairfield CountyFairfieldUnited States of AmericaUnited StatesBethelPemberwickConnecticutNortheastGreenwichStamfordDanburySouthportNew EnglandNorwalkWilton CenterSheltonStratfordGlenville33.342857%33.342857%33.3%2,334133.017334%33.017334%33.0%7,105230.281095%30.281095%30.3%2,510329.347826%29.347826%29.3%27428.998941%28.998941%29.0%2,190528.885228%28.885228%28.9%526628.621205%28.621205%28.6%575728.188725%28.188725%28.2%7,755825.677123%25.677123%25.7%1,678925.032212%25.032212%25.0%9,1311024.515266%24.515266%24.5%1,1001124.312688%24.312688%24.3%35,74535.7k1223.577077%23.577077%23.6%222,006222k23.577077%23.577077%23.6%222,006222k23.108006%23.108006%23.1%73,612,43873.6M22.366628%22.366628%22.4%2,1341322.001867%22.001867%22.0%9431421.558782%21.558782%21.6%773,652774k21.341491%21.341491%21.3%11,965,27112.0M21.326979%21.326979%21.3%2,8641521.302096%21.302096%21.3%27,14127.1k1621.120515%21.120515%21.1%17,71817.7k1721.074380%21.074380%21.1%3571820.620396%20.620396%20.6%3,024,7813.02M20.469692%20.469692%20.5%17,99918.0k1920.444444%20.444444%20.4%1382018.924327%18.924327%18.9%7,7552118.804971%18.804971%18.8%9,8352214.769765%14.769765%14.8%34023

Age Cohorts by County Subdivision in Fairfield County

There are 24 county subdivisions in Fairfield County. This section compares all 24 of those to each other, Fairfield County, and other entities that contain or substantially overlap with Fairfield County.

Children by County Subdivision#32

Percentage of population aged 0 to 17 (%):
Scope: population of Fairfield County, selected county subdivisions in Fairfield County, and entities that contain Fairfield County
0%10%20%30%Count#Town of DarienDarienTown of WestonWestonTown of New CanaanNew CanaanTown of WiltonWiltonTown of RidgefieldRidgefieldTown of WestportWestportTown of MonroeMonroeTown of GreenwichGreenwichTown of NewtownNewtownTown of TrumbullTrumbullTown of FairfieldFairfieldTown of BridgeportBridgeportTown of BrookfieldBrookfieldTown of New FairfieldNew FairfieldBridgeport, Stamford, and Norwalk Metro AreaBridgeportFairfield CountyFairfieldTown of EastonEastonTown of ReddingReddingUnited States of AmericaUnited StatesTown of BethelBethelConnecticutNortheastTown of StamfordStamfordTown of ShermanShermanTown of DanburyDanburyNew EnglandTown of NorwalkNorwalkTown of SheltonSheltonTown of StratfordStratford33.017334%33.017334%33.0%7,105131.381077%31.381077%31.4%3,247230.630186%30.630186%30.6%6,202330.081650%30.081650%30.1%5,600429.194030%29.194030%29.2%7,335528.188725%28.188725%28.2%7,755625.449858%25.449858%25.4%5,035725.428562%25.428562%25.4%15,87215.9k825.094677%25.094677%25.1%7,024925.032212%25.032212%25.0%9,1311024.639199%24.639199%24.6%15,05815.1k1124.312688%24.312688%24.3%35,74535.7k1224.042428%24.042428%24.0%4,0801323.936057%23.936057%23.9%3,3691423.577077%23.577077%23.6%222,006222k23.577077%23.577077%23.6%222,006222k23.343433%23.343433%23.3%1,7721523.253558%23.253558%23.3%2,1571623.108006%23.108006%23.1%73,612,43873.6M22.184935%22.184935%22.2%4,2971721.558782%21.558782%21.6%773,652774k21.341491%21.341491%21.3%11,965,27112.0M21.302096%21.302096%21.3%27,14127.1k1821.164889%21.164889%21.2%7741921.120515%21.120515%21.1%17,71817.7k2020.620396%20.620396%20.6%3,024,7813.02M20.469692%20.469692%20.5%17,99918.0k2118.924327%18.924327%18.9%7,7552218.804971%18.804971%18.8%9,83523

Age Cohorts by County in Connecticut

There are 8 counties in Connecticut. This section compares Fairfield County to all of the counties in Connecticut and to those entities that contain or substantially overlap with Fairfield County.

Children by County#41

Percentage of population aged 0 to 17 (%):
Scope: population of Fairfield County, selected other counties in Connecticut, and entities that contain Fairfield County
0%5%10%15%20%Count#Bridgeport, Stamford, and Norwalk Metro AreaBridgeportFairfield CountyFairfieldUnited States of AmericaUnited StatesHartford CountyHartfordConnecticutNortheastNew Haven CountyNew HavenWindham CountyWindhamNew EnglandNew London CountyNew LondonLitchfield CountyLitchfieldMiddlesex CountyMiddlesexTolland CountyTolland23.577077%23.577077%23.6%222,006222k23.577077%23.577077%23.6%222,006222k123.108006%23.108006%23.1%73,612,43873.6M21.724374%21.724374%21.7%194,585195k221.558782%21.558782%21.6%773,652774k21.341491%21.341491%21.3%11,965,27112.0M21.104715%21.104715%21.1%181,685182k320.727208%20.727208%20.7%24,26724.3k420.620396%20.620396%20.6%3,024,7813.02M20.307463%20.307463%20.3%55,24355.2k519.486770%19.486770%19.5%36,07836.1k619.240686%19.240686%19.2%31,63931.6k718.557048%18.557048%18.6%28,14928.1k8

Age Cohorts by County in the United States

There are 3,142 counties in the United States. This section compares Fairfield County to the 50 most populous counties in the United States and to those entities that contain or substantially overlap with Fairfield County. The least populous of the compared counties has a population of 941,618.

Children by County#50

Percentage of population aged 0 to 17 (%):
Scope: population of Fairfield County, selected other counties in the United States, and entities that contain Fairfield County
0%5%10%15%20%25%Count#Fresno CountyFresnoSalt Lake CountySalt LakeSan Bernardino CountySan BernardinoHarris CountyHarrisTarrant CountyTarrantDallas CountyDallasRiverside CountyRiversideBexar CountyBexarBronx CountyBronxMaricopa CountyMaricopaWake CountyWakeMecklenburg CountyMecklenburgMilwaukee CountyMilwaukeeSacramento CountySacramentoWayne CountyWayneFairfax CountyFairfaxClark CountyClarkFranklin CountyFranklinBridgeport, Stamford, and Norwalk Metro AreaBridgeportFairfield CountyFairfieldMontgomery CountyMontgomeryContra Costa CountyContra CostaKings CountyKingsHillsborough CountyHillsboroughUnited States of AmericaUnited StatesSanta Clara CountySanta ClaraTravis CountyTravisOrange CountyOrangeWestchester CountyWestchesterFulton CountyFultonLos Angeles CountyLos AngelesOrange CountyOrangeCook CountyCookSt. Louis CountySt. LouisSan Diego CountySan DiegoSuffolk CountySuffolkHennepin CountyHennepinPhiladelphia CountyPhiladelphiaNassau CountyNassauOakland CountyOaklandPima CountyPimaHonolulu CountyHonoluluBroward CountyBrowardCuyahoga CountyCuyahogaConnecticutAlameda CountyAlamedaNortheastKing CountyKingNew EnglandMiami-Dade CountyMiami-DadeMiddlesex CountyMiddlesexQueens CountyQueensPalm Beach CountyPalm BeachAllegheny CountyAlleghenyNew York CountyNew York28.888866%28.888866%28.9%278,246278k128.329602%28.329602%28.3%309,506310k227.363518%27.363518%27.4%576,482576k327.228891%27.228891%27.2%1,207,3991.21M427.104397%27.104397%27.1%527,866528k526.929187%26.929187%26.9%676,745677k626.401700%26.401700%26.4%613,547614k726.219361%26.219361%26.2%487,339487k825.573137%25.573137%25.6%367,431367k925.043628%25.043628%25.0%1,023,9211.02M1024.990987%24.990987%25.0%249,554250k1124.574361%24.574361%24.6%248,637249k1224.468076%24.468076%24.5%233,745234k1324.396471%24.396471%24.4%360,897361k1424.179435%24.179435%24.2%427,394427k1523.983328%23.983328%24.0%271,704272k1623.862053%23.862053%23.9%493,981494k1723.668593%23.668593%23.7%291,625292k1823.577077%23.577077%23.6%222,006222k23.577077%23.577077%23.6%222,006222k1923.549379%23.549379%23.5%241,704242k2023.527315%23.527315%23.5%260,665261k2123.337305%23.337305%23.3%608,369608k2223.197227%23.197227%23.2%306,913307k2323.108006%23.108006%23.1%73,612,43873.6M23.087802%23.087802%23.1%435,218435k2423.030006%23.030006%23.0%264,425264k2523.024375%23.024375%23.0%721,172721k2622.943185%22.943185%22.9%222,372222k2722.934276%22.934276%22.9%228,599229k2822.837323%22.837323%22.8%2,296,7852.30M2922.760229%22.760229%22.8%285,881286k3022.694997%22.694997%22.7%1,186,3981.19M3122.432138%22.432138%22.4%224,447224k3222.366565%22.366565%22.4%727,664728k3322.324565%22.324565%22.3%334,451334k3422.273612%22.273612%22.3%269,347269k3522.168125%22.168125%22.2%345,809346k3622.141419%22.141419%22.1%300,415300k3722.121412%22.121412%22.1%273,247273k3821.856045%21.856045%21.9%219,290219k3921.601744%21.601744%21.6%213,209213k4021.598472%21.598472%21.6%402,548403k4121.569623%21.569623%21.6%271,499271k4221.558782%21.558782%21.6%773,652774k21.443331%21.443331%21.4%344,212344k4321.341491%21.341491%21.3%11,965,27112.0M20.896492%20.896492%20.9%434,553435k4420.620396%20.620396%20.6%3,024,7813.02M20.604500%20.604500%20.6%548,990549k4520.568254%20.568254%20.6%322,430322k4620.470812%20.470812%20.5%472,878473k4719.641010%19.641010%19.6%274,730275k4819.092867%19.092867%19.1%234,911235k4914.639548%14.639548%14.6%239,355239k50

Definitions

The US Census reports extensively on the topics of age and sex, often reporting other topics broken down by age and sex cohorts. This page reports on age and sex alone; charts presenting other topics by age and sex can be found on their topic-specific pages.

  • Children: less than 18 years old
  • College: from 18 to 21 years old
  • 20s: from 22 to 29 years old, to not overlap the college category
  • Younger Adult: from 22 to 39 years old
  • Older Adult: from 40 to 64 years old
  • Senior: more than 64 years old

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

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