Age and Sex in Grundy County, Iowa (County)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the counties in Iowa.
Scope: population of Iowa, Grundy County, and other counties in Iowa
Grundy County
Iowa
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0.0%0.5%1.0%1.5%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-43652.950%2.95%4203.394%3.39%4373.532%3.53%4883.944%3.94%4353.516%3.52%2982.408%2.41%4723.815%3.81%3572.885%2.89%9097.347%7.35%9207.436%7.44%7666.191%6.19%6855.536%5.54%7706.223%6.22%7175.795%5.79%5864.736%4.74%3122.522%2.52%1431.156%1.16%1291.043%1.04%2482.004%2.00%5274.259%4.26%7045.690%5.69%9797.912%7.91%7065.706%5.71%
Count number of people in age cohort
% age cohort as a percentage of the total population
1normalized with respect to the number of years in each interval

Age and Sex#2

Percentage in each age cohort per year of age.1
Scope: population of Iowa and Grundy County
Female Male
Iowa
Grundy County
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%Senior2Older Adult3Younger Adult4College5Children6-0.238198%-0.072066%-0.192490%-0.053856%-0.310263%0.31%0.238198%0.192490%0.238198%0.24%2,44319.745%19.7%-0.660470%-0.638182%-0.660470%0.66%0.660470%0.007436%0.638182%0.001353%0.667906%0.67%4,10933.209%33.2%-0.530276%-0.010327%-0.619125%-0.540604%0.54%0.530276%0.619125%0.025145%0.530276%0.53%2,38519.276%19.3%-0.438455%-0.735381%-0.438455%0.44%0.438455%0.173765%0.735381%0.054111%0.612220%0.61%5204.203%4.20%-0.651508%-0.634612%-0.651508%0.65%0.651508%0.006286%0.634612%0.031800%0.657794%0.66%2,91623.567%23.6%
Count number of people in age cohort
% age cohort as a percentage of the total population
1normalized with respect to the number of years in each interval 265+ 340-64 422-39 518-21 60-17

Detailed Age and Sex#3

Percentage in each age cohort per year of age.1
Scope: population of Iowa and Grundy County
Female Male
Iowa
Grundy County
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-0.046977%-0.090419%-0.051411%-0.053545%-0.137396%0.14%0.046977%0.051411%0.046977%0.05%3652.950%2.95%-0.274792%-0.129314%-0.174468%-0.075066%-0.404106%0.40%0.274792%0.174468%0.274792%0.27%4203.394%3.39%-0.341065%-0.024246%-0.248144%-0.065989%-0.365312%0.37%0.341065%0.248144%0.341065%0.34%4373.532%3.53%-0.362079%-0.064657%-0.334521%-0.038389%-0.426736%0.43%0.362079%0.334521%0.362079%0.36%4883.944%3.94%-0.581912%-0.424367%-0.036879%-0.581912%0.58%0.581912%0.008082%0.424367%0.589994%0.59%4353.516%3.52%-0.581912%-0.040411%-0.524144%-0.037115%-0.622323%0.62%0.581912%0.524144%0.581912%0.58%2982.408%2.41%-0.595382%-0.080821%-0.595229%-0.000536%-0.676204%0.68%0.595382%0.595229%0.595382%0.60%4723.815%3.81%-0.686980%-0.663219%-0.010462%-0.686980%0.69%0.686980%0.068698%0.663219%0.755678%0.76%3572.885%2.89%-0.704760%-0.675983%-0.012541%-0.704760%0.70%0.704760%0.059808%0.675983%0.764568%0.76%9097.347%7.35%-0.712842%-0.061424%-0.690906%-0.006245%-0.774267%0.77%0.712842%0.690906%0.712842%0.71%9207.436%7.44%-0.617474%-0.607007%-0.617474%0.62%0.617474%0.003233%0.607007%0.012683%0.620706%0.62%7666.191%6.19%-0.525337%-0.571295%-0.525337%0.53%0.525337%0.056575%0.571295%0.017376%0.581912%0.58%6855.536%5.54%-0.617474%-0.009699%-0.587487%-0.627172%0.63%0.617474%0.587487%0.012483%0.617474%0.62%7706.223%6.22%-0.575447%-0.628104%-0.575447%0.58%0.575447%0.008082%0.628104%0.026170%0.583529%0.58%7175.795%5.79%-0.457448%-0.601386%-0.457448%0.46%0.457448%0.032328%0.601386%0.033864%0.489776%0.49%5864.736%4.74%-0.363695%-0.113150%-0.686455%-0.476845%0.48%0.363695%0.686455%0.030011%0.363695%0.36%3122.522%2.52%-0.533420%-0.733441%-0.533420%0.53%0.533420%0.088903%0.733441%0.046900%0.622323%0.62%1431.156%1.16%-0.299038%-0.770169%-0.299038%0.30%0.299038%0.444516%0.770169%0.056074%0.743555%0.74%1291.043%1.04%-0.460681%-0.718956%-0.460681%0.46%0.460681%0.080821%0.718956%0.056734%0.541502%0.54%2482.004%2.00%-0.705838%-0.640338%-0.705838%0.71%0.705838%0.008082%0.640338%0.030076%0.713920%0.71%5274.259%4.26%-0.539885%-0.639003%-0.539885%0.54%0.539885%0.058191%0.639003%0.033033%0.598076%0.60%7045.690%5.69%-0.787198%-0.643465%-0.787198%0.79%0.787198%0.008082%0.643465%0.031842%0.795280%0.80%9797.912%7.91%-0.546351%-0.048493%-0.617932%-0.594844%0.59%0.546351%0.617932%0.031559%0.546351%0.55%7065.706%5.71%
Count number of people in age cohort
% age cohort as a percentage of the total population
1normalized with respect to the number of years in each interval

Detailed Sex Ratio#4

Percentage more males or females in selected age cohorts.
Scope: population of Iowa and Grundy County
More Females More Males
Iowa
Grundy County
100%0%100%M:FFM85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-192.473118%-104.151992%-192.473118%192.5%0.3420.3474.521%74.5%25.479%25.5%-47.058824%-43.025830%-47.058824%47.1%0.6800.6859.524%59.5%40.476%40.5%-7.109005%-26.592985%-7.109005%7.1%0.9340.9351.716%51.7%48.284%48.3%-17.857143%-11.475915%-17.857143%17.9%0.8480.8554.098%54.1%45.902%45.9%-8.690265%1.388889%1.388889%1.4%1.0141.0149.655%49.7%50.345%50.3%-6.944444%-7.081005%-6.944444%6.9%0.9350.9451.678%51.7%48.322%48.3%-13.574661%-0.090132%-13.574661%13.6%0.8800.8853.178%53.2%46.822%46.8%-1.577402%10.000000%10.000000%10.0%1.1001.1047.619%47.6%52.381%52.4%-1.855238%8.486239%8.486239%8.5%1.0851.0847.965%48.0%52.035%52.0%-8.616780%-0.903856%-8.616780%8.6%0.9210.9252.065%52.1%47.935%47.9%0.523560%2.089388%0.523560%0.5%1.0051.0149.869%49.9%50.131%50.1%10.769231%3.041504%10.769231%10.8%1.1081.1147.445%47.4%52.555%52.6%-1.570681%-1.570681%1.6%2.124838%0.9850.9850.390%50.4%49.610%49.6%1.404494%4.166539%1.404494%1.4%1.0141.0149.651%49.7%50.349%50.3%7.067138%5.630908%7.067138%7.1%1.0711.0748.294%48.3%51.706%51.7%-31.111111%-31.111111%31.1%4.371952%0.7630.7656.731%56.7%43.269%43.3%16.666667%6.394558%16.666667%16.7%1.1671.1746.154%46.2%53.846%53.8%148.648649%7.280782%148.648649%148.6%2.4862.4928.682%28.7%71.318%71.3%17.543860%7.891202%17.543860%17.5%1.1751.1845.968%46.0%54.032%54.0%1.145038%4.696873%1.145038%1.1%1.0111.0149.715%49.7%50.285%50.3%10.778443%5.169461%10.778443%10.8%1.1081.1147.443%47.4%52.557%52.6%1.026694%4.948524%1.026694%1.0%1.0101.0149.745%49.7%50.255%50.3%-8.875740%-8.875740%8.9%5.107154%0.9180.9252.125%52.1%47.875%47.9%
M:F ratio of males to females in the age cohort
F females as a percentage of the age cohort
M males as a percentage of the age cohort

Map of Age Cohorts by County Subdivision in Grundy County

Children Age Cohorts by County Subdivision#5

Percentage of population aged 0 to 17 (%):
11.7%15.5%19.3%23.1%26.9%30.7%

College Age Cohorts by County Subdivision#6

Percentage of population aged 18 to 21 (%):
0.0%3.2%6.4%9.6%12.8%16.1%

20s Age Cohorts by County Subdivision#7

Percentage of population aged 22 to 29 (%):
0.0%2.6%5.2%7.8%10.4%13.1%

30s Age Cohorts by County Subdivision#8

Percentage of population aged 30 to 39 (%):
0.0%3.4%6.8%10.2%13.6%17.1%

40s Age Cohorts by County Subdivision#9

Percentage of population aged 40 to 49 (%):
2.6%6.7%10.7%14.7%18.7%22.7%

50s Age Cohorts by County Subdivision#10

Percentage of population aged 50 to 59 (%):
10.9%15.3%19.7%24.1%28.6%33.0%

60s Age Cohorts by County Subdivision#11

Percentage of population aged 60 to 69 (%):
2.2%6.0%9.6%13.3%17.0%20.8%

70s Age Cohorts by County Subdivision#12

Percentage of population aged 70 to 79 (%):
0.0%3.5%7.1%10.6%14.2%17.8%

80+ Age Cohorts by County Subdivision#13

Percentage of population aged 80 and older (%):
0.0%1.8%3.5%5.3%7.1%8.9%
Road Data ©OpenStreetMap

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Map of Age Cohorts by Tract in Grundy County

Children Age Cohorts by Tract#14

Percentage of population aged 0 to 17 (%):
20.8%21.6%22.4%23.1%23.9%24.7%

College Age Cohorts by Tract#15

Percentage of population aged 18 to 21 (%):
2.6%3.2%3.8%4.3%4.8%5.4%

20s Age Cohorts by Tract#16

Percentage of population aged 22 to 29 (%):
5.5%6.3%7.1%7.8%8.6%9.4%

30s Age Cohorts by Tract#17

Percentage of population aged 30 to 39 (%):
9.3%10.1%10.8%11.6%12.3%13.1%

40s Age Cohorts by Tract#18

Percentage of population aged 40 to 49 (%):
7.6%9.0%10.4%11.7%13.1%14.5%

50s Age Cohorts by Tract#19

Percentage of population aged 50 to 59 (%):
13.1%13.8%14.4%15.0%15.6%16.3%

60s Age Cohorts by Tract#20

Percentage of population aged 60 to 69 (%):
11.77%12.23%12.68%13.13%13.59%14.04%

70s Age Cohorts by Tract#21

Percentage of population aged 70 to 79 (%):
5.4%6.4%7.4%8.3%9.3%10.3%

80+ Age Cohorts by Tract#22

Percentage of population aged 80 and older (%):
4.8%5.4%6.1%6.7%7.3%8.0%
Road Data ©OpenStreetMap

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Map of Age Cohorts by Block Group in Grundy County

Children Age Cohorts by Block Group#23

Percentage of population aged 0 to 17 (%):
19.6%21.4%23.3%25.1%27.0%28.9%

College Age Cohorts by Block Group#24

Percentage of population aged 18 to 21 (%):
1.7%4.0%6.2%8.3%10.5%12.8%

20s Age Cohorts by Block Group#25

Percentage of population aged 22 to 29 (%):
3.2%5.0%6.8%8.6%10.3%12.1%

30s Age Cohorts by Block Group#26

Percentage of population aged 30 to 39 (%):
6.4%8.4%10.3%12.3%14.2%16.2%

40s Age Cohorts by Block Group#27

Percentage of population aged 40 to 49 (%):
5.9%7.7%9.6%11.4%13.2%15.1%

50s Age Cohorts by Block Group#28

Percentage of population aged 50 to 59 (%):
7.5%10.2%12.8%15.5%18.1%20.8%

60s Age Cohorts by Block Group#29

Percentage of population aged 60 to 69 (%):
9.3%11.1%12.9%14.7%16.5%18.4%

70s Age Cohorts by Block Group#30

Percentage of population aged 70 to 79 (%):
3.0%4.6%6.1%7.7%9.2%10.8%

80+ Age Cohorts by Block Group#31

Percentage of population aged 80 and older (%):
2.0%4.0%5.9%7.8%9.7%11.7%
Road Data ©OpenStreetMap

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Age Cohorts by Place in Grundy County

There are 9 places in Grundy County. This section compares all 9 of those to each other, Grundy County, and other entities that contain or substantially overlap with Grundy County.

Children by Place#32

Percentage of population aged 0 to 17 (%):
Scope: population of Grundy County, selected places in Grundy County, and entities that contain Grundy County
0%10%20%30%Count#HollandDikeWellsburgBeamanWest North CentralGrundy CountyGrundyIowaGrundy CenterMidwestUnited States of AmericaUnited StatesMorrisonConradWaterloo and Cedar Falls Metro AreaWaterloo AreaReinbeckStout33.802817%33.802817%33.8%96128.800611%28.800611%28.8%377226.587729%26.587729%26.6%247326.470588%26.470588%26.5%63423.689691%23.689691%23.7%4,971,0164.97M23.567445%23.567445%23.6%2,91623.418418%23.418418%23.4%727,514728k23.364140%23.364140%23.4%632523.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M22.950820%22.950820%23.0%28622.460391%22.460391%22.5%241721.775376%21.775376%21.8%36,98737.0k20.963173%20.963173%21.0%370819.135802%19.135802%19.1%319
Count number of children
# rank of place out of 9 by %

Age Cohorts by County Subdivision in Grundy County

There are 14 county subdivisions in Grundy County. This section compares all 14 of those to each other, Grundy County, and other entities that contain or substantially overlap with Grundy County.

Children by County Subdivision#41

Percentage of population aged 0 to 17 (%):
Scope: population of Grundy County, selected county subdivisions in Grundy County, and entities that contain Grundy County
0%10%20%30%Count#Colfax TownshipColfaxLincoln TownshipLincolnGrant TownshipGrantFairfield TownshipFairfieldWashington TownshipWashingtonWest North CentralPalermo TownshipPalermoGrundy CountyGrundyIowaMidwestUnited States of AmericaUnited StatesClay TownshipShiloh TownshipShilohBlack Hawk TownshipBlack HawkBeaver TownshipBeaverWaterloo and Cedar Falls Metro AreaWaterloo AreaGerman TownshipGermanFelix TownshipFelixPleasant Valley TownshipPleasant VlyMelrose TownshipMelrose30.645161%30.645161%30.6%152130.149254%30.149254%30.1%101226.503759%26.503759%26.5%423326.452906%26.452906%26.5%132424.050633%24.050633%24.1%57523.689691%23.689691%23.7%4,971,0164.97M23.602484%23.602484%23.6%684623.567445%23.567445%23.6%2,91623.418418%23.418418%23.4%727,514728k23.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M23.001949%23.001949%23.0%354722.692633%22.692633%22.7%268821.796071%21.796071%21.8%466921.777778%21.777778%21.8%981021.775376%21.775376%21.8%36,98737.0k20.168067%20.168067%20.2%481119.730942%19.730942%19.7%441218.873239%18.873239%18.9%671311.702128%11.702128%11.7%2214
Count number of children
# rank of county subdivision out of 14 by %

Age Cohorts by County in the Waterloo Area

There are 3 counties in the Waterloo Area. This section compares Grundy County to all of the counties in the Waterloo Area and to those entities that contain or substantially overlap with Grundy County.

Children by County#50

Percentage of population aged 0 to 17 (%):
Scope: population of Grundy County, selected other counties in the Waterloo Area, and entities that contain Grundy County
0%5%10%15%20%Count#West North CentralGrundy CountyGrundyIowaMidwestUnited States of AmericaUnited StatesBremer CountyBremerWaterloo and Cedar Falls Metro AreaWaterloo AreaBlack Hawk CountyBlack Hawk23.689691%23.689691%23.7%4,971,0164.97M23.567445%23.567445%23.6%2,916123.418418%23.418418%23.4%727,514728k23.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M22.016786%22.016786%22.0%5,430221.775376%21.775376%21.8%36,98737.0k21.563608%21.563608%21.6%28,64128.6k3
Count number of children
# rank of county out of 3 by %

Age Cohorts by County in Iowa

There are 99 counties in Iowa. This section compares Grundy County to the 50 most populous counties in Iowa and to those entities that contain or substantially overlap with Grundy County. The least populous of the compared counties has a population of 15,552.

Children by County#59

Percentage of population aged 0 to 17 (%):
Scope: population of Grundy County, selected other counties in Iowa, and entities that contain Grundy County
0%10%20%Count#Dallas CountyDallasSioux CountySiouxBuchanan CountyBuchananWoodbury CountyWoodburyMadison CountyMadisonCrawford CountyCrawfordMuscatine CountyMuscatineBuena Vista CountyBuena VistaPolk CountyPolkWarren CountyWarrenPlymouth CountyPlymouthMarshall CountyMarshallWashington CountyWashingtonBenton CountyBentonTama CountyTamaCarroll CountyCarrollMarion CountyMarionScott CountyScottDelaware CountyDelawareLinn CountyLinnWest North CentralPottawattamie CountyPottawattamieMahaska CountyMahaskaGrundy CountyGrundyIowaIowa CountyIowaMidwestCedar CountyCedarUnited States of AmericaUnited StatesDubuque CountyDubuqueClinton CountyClintonDes Moines CountyDes MoinesClay CountyClayFloyd CountyFloydWapello CountyWapelloHenry CountyHenryBoone CountyBooneJackson CountyJacksonJasper CountyJasperHardin CountyHardinClayton CountyClaytonBremer CountyBremerWaterloo and Cedar Falls Metro AreaWaterloo AreaJones CountyJonesLee CountyLeeBlack Hawk CountyBlack HawkWebster CountyWebsterFayette CountyFayettePage CountyPageCerro Gordo CountyCerro GordoPoweshiek CountyPoweshiekJohnson CountyJohnsonJefferson CountyJeffersonDickinson CountyDickinsonWinneshiek CountyWinneshiekStory CountyStory28.497323%28.497323%28.5%22,24922.2k127.044279%27.044279%27.0%9,363226.679663%26.679663%26.7%5,611326.290200%26.290200%26.3%26,92826.9k425.994509%25.994509%26.0%4,071525.928734%25.928734%25.9%4,446625.406878%25.406878%25.4%10,91210.9k725.375397%25.375397%25.4%5,188825.291021%25.291021%25.3%116,126116k925.204484%25.204484%25.2%12,14112.1k1025.124139%25.124139%25.1%6,2741125.003069%25.003069%25.0%10,18510.2k1224.752430%24.752430%24.8%5,4741324.642302%24.642302%24.6%6,3381424.203639%24.203639%24.2%4,2171524.169302%24.169302%24.2%4,9681624.119649%24.119649%24.1%8,0071724.059118%24.059118%24.1%41,16941.2k1824.029808%24.029808%24.0%4,1921923.886168%23.886168%23.9%52,09052.1k2023.689691%23.689691%23.7%4,971,0164.97M23.681839%23.681839%23.7%22,07122.1k2123.588963%23.588963%23.6%5,2662223.567445%23.567445%23.6%2,91623.418418%23.418418%23.4%727,514728k23.349259%23.349259%23.3%3,8122323.217458%23.217458%23.2%15,712,75815.7M23.171461%23.171461%23.2%4,2612423.108006%23.108006%23.1%73,612,43873.6M23.102149%23.102149%23.1%22,26122.3k2523.017594%23.017594%23.0%11,04211.0k2622.899736%22.899736%22.9%9,1862722.812234%22.812234%22.8%3,7592822.663084%22.663084%22.7%3,6272922.436298%22.436298%22.4%7,9073022.416128%22.416128%22.4%4,4703122.335391%22.335391%22.3%5,8993222.300169%22.300169%22.3%4,3553322.187117%22.187117%22.2%8,1463422.102286%22.102286%22.1%3,8293522.058077%22.058077%22.1%3,9123622.016786%22.016786%22.0%5,4303721.775376%21.775376%21.8%36,98737.0k21.683512%21.683512%21.7%4,4413821.630843%21.630843%21.6%7,6083921.563608%21.563608%21.6%28,64128.6k4021.511471%21.511471%21.5%7,9704121.362366%21.362366%21.4%4,3564221.129115%21.129115%21.1%3,2864320.804563%20.804563%20.8%9,0094420.191172%20.191172%20.2%3,7604520.137881%20.137881%20.1%28,59728.6k4619.516476%19.516476%19.5%3,4474719.400446%19.400446%19.4%3,3074818.774352%18.774352%18.8%3,9034917.082481%17.082481%17.1%16,20016.2k50
Count number of children
# rank of county out of 50 by %

Age Cohorts by County in the United States

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

Children by County#68

Percentage of population aged 0 to 17 (%):
Scope: population of Grundy County, selected other counties in the United States, and entities that contain Grundy County
0%10%20%Count#Fresno CountyFresnoSalt Lake CountySalt LakeSan Bernardino CountySan BernardinoHarris CountyHarrisTarrant CountyTarrantDallas CountyDallasRiverside CountyRiversideBexar CountyBexarBronx CountyBronxMaricopa CountyMaricopaWake CountyWakeMecklenburg CountyMecklenburgMilwaukee CountyMilwaukeeSacramento CountySacramentoWayne CountyWayneFairfax CountyFairfaxClark CountyClarkWest North CentralFranklin CountyFranklinFairfield CountyFairfieldGrundy CountyGrundyMontgomery CountyMontgomeryContra Costa CountyContra CostaIowaKings CountyKingsMidwestHillsborough 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 CountyPimaWaterloo and Cedar Falls Metro AreaWaterloo AreaHonolulu CountyHonoluluBroward CountyBrowardCuyahoga CountyCuyahogaAlameda CountyAlamedaKing CountyKingMiami-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%493,981494k1723.689691%23.689691%23.7%4,971,0164.97M23.668593%23.668593%23.7%291,625292k1823.577077%23.577077%23.6%222,006222k1923.567445%23.567445%23.6%2,91623.549379%23.549379%23.5%241,704242k2023.527315%23.527315%23.5%260,665261k2123.418418%23.418418%23.4%727,514728k23.337305%23.337305%23.3%608,369608k2223.217458%23.217458%23.2%15,712,75815.7M23.197227%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%219,290219k3921.775376%21.775376%21.8%36,98737.0k21.601744%21.601744%21.6%213,209213k4021.598472%21.598472%21.6%402,548403k4121.569623%21.569623%21.6%271,499271k4221.443331%21.443331%21.4%344,212344k4320.896492%20.896492%20.9%434,553435k4420.604500%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
Count number of children
# rank of county out of 50 by %

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.

More Topics to Explore

Demographics

Income

Education

More Maps to Explore

Cities:
Beaman, Conrad, Dike, Grundy Center, Holland, Morrison, Reinbeck, Stout, Wellsburg
Townships:
Beaver, Black Hawk, Clay, Colfax, Fairfield, Felix, German, Grant, Lincoln, Melrose, Palermo, Pleasant Valley, Shiloh, Washington
ZIP Codes:
50601, 50604, 50609, 50613, 50621, 50624, 50627, 50638, 50642, 50643, 50660, 50665, 50669, 50672, 50673, 50680
Unified School Districts:
AGWSR, Aplington-Parkersburg, BCLUW, Dike-New Hartford, Eldora-New Providence, Gladbrook-Reinbeck, Grundy Center
Congressional District:
IA-4
State Senate District:
IA-25
State House District:
IA-50
Neighboring Counties:
Black Hawk, Butler, Franklin, Hardin, Marshall, Tama
Nearby Counties:
Benton, Bremer, Cerro Gordo, Chickasaw, Floyd, Jasper, Poweshiek, Story