Age and Sex in Martinsburg, Iowa (City)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the places in Iowa.
Scope: population of Iowa, Martinsburg, and other places in Iowa
Martinsburg
Iowa
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0%1%2%3%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-432.400%2.40%00.000%0%10.800%0.80%21.600%1.60%43.200%3.20%64.800%4.80%75.600%5.60%00.000%0%21.600%1.60%108.000%8.00%64.800%4.80%118.800%8.80%21.600%1.60%2016.000%16.0%00.000%0%75.600%5.60%00.000%0%43.200%3.20%00.000%0%21.600%1.60%97.200%7.20%97.200%7.20%2016.000%16.0%
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 Martinsburg
Female Male
Iowa
Martinsburg
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%Senior2Older Adult3Younger Adult4College5Children6-0.088889%-0.192490%-0.053856%-0.088889%0.09%0.088889%0.177778%0.192490%0.266667%0.27%1612.800%12.8%-0.512000%-0.638182%-0.512000%0.51%0.512000%0.128000%0.638182%0.001353%0.640000%0.64%3628.800%28.8%-0.488889%-0.311111%-0.619125%-0.800000%0.80%0.488889%0.619125%0.025145%0.488889%0.49%2923.200%23.2%-0.000000%-0.735381%0.000000%0.00%0.000000%0.800000%0.735381%0.054111%0.800000%0.80%43.200%3.20%-0.888889%-0.634612%-0.888889%0.89%0.888889%0.000000%0.634612%0.031800%0.888889%0.89%4032.000%32.0%
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 Martinsburg
Female Male
Iowa
Martinsburg
Shaded bar tips show excess over facing bar.
3%2%1%0%1%2%3%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-0.000000%-0.051411%-0.053545%0.000000%0.0%0.000000%0.150000%0.051411%0.150000%0.2%32.400%2.40%-0.000000%-0.174468%-0.075066%0.000000%0.0%0.000000%0.000000%0.174468%0.000000%0.0%00.000%0%-0.000000%-0.248144%-0.065989%0.000000%0.0%0.000000%0.160000%0.248144%0.160000%0.2%10.800%0.80%-0.000000%-0.334521%-0.038389%0.000000%0.0%0.000000%0.320000%0.334521%0.320000%0.3%21.600%1.60%-0.533333%-0.424367%-0.036879%-0.533333%0.5%0.533333%0.000000%0.424367%0.533333%0.5%43.200%3.20%-0.800000%-0.524144%-0.037115%-0.800000%0.8%0.800000%0.800000%0.524144%1.600000%1.6%64.800%4.80%-0.533333%-0.800000%-0.595229%-0.000536%-1.333333%1.3%0.533333%0.595229%0.533333%0.5%75.600%5.60%-0.000000%-0.663219%-0.010462%0.000000%0.0%0.000000%0.000000%0.663219%0.000000%0.0%00.000%0%-0.000000%-0.675983%-0.012541%0.000000%0.0%0.000000%0.320000%0.675983%0.320000%0.3%21.600%1.60%-0.640000%-0.690906%-0.006245%-0.640000%0.6%0.640000%0.320000%0.690906%0.960000%1.0%108.000%8.00%-0.320000%-0.607007%-0.320000%0.3%0.320000%0.320000%0.607007%0.012683%0.640000%0.6%64.800%4.80%-0.800000%-0.571295%-0.800000%0.8%0.800000%0.160000%0.571295%0.017376%0.960000%1.0%118.800%8.80%-0.000000%-0.320000%-0.587487%-0.320000%0.3%0.000000%0.587487%0.012483%0.000000%0.0%21.600%1.60%-1.120000%-0.960000%-0.628104%-2.080000%2.1%1.120000%0.628104%0.026170%1.120000%1.1%2016.000%16.0%-0.000000%-0.601386%0.000000%0.0%0.000000%0.000000%0.601386%0.033864%0.000000%0.0%00.000%0%-0.800000%-0.686455%-0.800000%0.8%0.800000%0.266667%0.686455%0.030011%1.066667%1.1%75.600%5.60%-0.000000%-0.733441%0.000000%0.0%0.000000%0.000000%0.733441%0.046900%0.000000%0.0%00.000%0%-0.000000%-0.770169%0.000000%0.0%0.000000%3.200000%0.770169%0.056074%3.200000%3.2%43.200%3.20%-0.000000%-0.718956%0.000000%0.0%0.000000%0.000000%0.718956%0.056734%0.000000%0.0%00.000%0%-0.000000%-0.533333%-0.640338%-0.533333%0.5%0.000000%0.640338%0.030076%0.000000%0.0%21.600%1.60%-0.320000%-0.800000%-0.639003%-1.120000%1.1%0.320000%0.639003%0.033033%0.320000%0.3%97.200%7.20%-0.480000%-0.643465%-0.480000%0.5%0.480000%0.480000%0.643465%0.031842%0.960000%1.0%97.200%7.20%-1.280000%-0.617932%-1.280000%1.3%1.280000%0.640000%0.617932%0.031559%1.920000%1.9%2016.000%16.0%
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 Martinsburg
More Females More Males
Iowa
Martinsburg
1,000%500%0%M:FFM67-6965-6662-6450-5445-4940-4435-3930-3422-2415-1710-145-90-40.000000%-8.690265%0.000000%0.0%1.0001.0050.000%50.0%50.000%50.0%-7.081005%100.000000%100.000000%100.0%2.0002.0033.333%33.3%66.667%66.7%-150.000000%-0.090132%-150.000000%150.0%0.4000.4071.429%71.4%28.571%28.6%-0.903856%50.000000%50.000000%50.0%1.5001.5040.000%40.0%60.000%60.0%100.000000%2.089388%100.000000%100.0%2.0002.0033.333%33.3%66.667%66.7%20.000000%3.041504%20.000000%20.0%1.2001.2045.455%45.5%54.545%54.5%-1,000.000000%-1,000.000000%> 1000%2.124838%0.0000100.000%100%0.000%0%-85.714286%-85.714286%85.7%4.166539%0.5380.5465.000%65.0%35.000%35.0%33.333333%4.371952%33.333333%33.3%1.3331.3342.857%42.9%57.143%57.1%-1,000.000000%-1,000.000000%> 1000%4.696873%0.0000100.000%100%0.000%0%-250.000000%-250.000000%250.0%5.169461%0.2860.2977.778%77.8%22.222%22.2%100.000000%4.948524%100.000000%100.0%2.0002.0033.333%33.3%66.667%66.7%50.000000%5.107154%50.000000%50.0%1.5001.5040.000%40.0%60.000%60.0%
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 Block in Martinsburg

Children Age Cohorts by Block#5

Percentage of population aged 0 to 17 (%):
0%9%18%27%36%45%

College Age Cohorts by Block#6

Percentage of population aged 18 to 21 (%):
0.0%2.0%4.0%6.0%8.0%10.0%

20s Age Cohorts by Block#7

Percentage of population aged 22 to 29 (%):
0.0%4.4%8.9%13.3%17.8%22.3%

30s Age Cohorts by Block#8

Percentage of population aged 30 to 39 (%):
0%7%13%20%27%34%

40s Age Cohorts by Block#9

Percentage of population aged 40 to 49 (%):
0%8%16%24%32%40%

50s Age Cohorts by Block#10

Percentage of population aged 50 to 59 (%):
0%15%30%45%60%75%

60s Age Cohorts by Block#11

Percentage of population aged 60 to 69 (%):
0%6%12%18%24%31%

70s Age Cohorts by Block#12

Percentage of population aged 70 to 79 (%):
0%7%13%20%27%34%

80+ Age Cohorts by Block#13

Percentage of population aged 80 and older (%):
0%5%10%15%20%25%
Road Data ©OpenStreetMap

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Age Cohorts by Place in Keokuk County

There are 17 places in Keokuk County. This section compares Martinsburg to all of the places in Keokuk County and to those entities that contain or substantially overlap with Martinsburg.

Children by Place#14

Percentage of population aged 0 to 17 (%):
Scope: population of Martinsburg, selected other places in Keokuk County, and entities that contain Martinsburg
0%10%20%30%Count#Steady Run TownshipSteady RunNorth EnglishMartinsburgSouth EnglishThornburgKeswickHarperKeota080400-1B.G. 080400-1What CheerHedrickRichlandZIP Code 52563ZIP 52563WebsterWest North CentralIowaMidwestUnited States of AmericaUnited StatesKeokuk CountyKeokukPekin Community School DistrictPekin080400Tract 080400SigourneyDeltaOllieGibsonHayesvilleKinross33.105023%33.105023%33.1%14532.142857%32.142857%32.1%369132.000000%32.000000%32.0%40230.769231%30.769231%30.8%92330.666667%30.666667%30.7%23429.045643%29.045643%29.0%70528.125000%28.125000%28.1%27628.004292%28.004292%28.0%261727.899687%27.899687%27.9%17827.846365%27.846365%27.8%203826.722925%26.722925%26.7%190925.038402%25.038402%25.0%1631024.677003%24.677003%24.7%38224.218750%24.218750%24.2%311123.689691%23.689691%23.7%4,971,0164.97M23.418418%23.418418%23.4%727,514728k23.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M22.962673%22.962673%23.0%2,35022.543353%22.543353%22.5%81921.876145%21.876145%21.9%59719.572447%19.572447%19.6%4121215.447154%15.447154%15.4%381315.343915%15.343915%15.3%29148.333333%8.333333%8.3%4157.142857%7.142857%7.1%3165.660377%5.660377%5.7%317
Count number of children
# rank of place out of 17 by %

Age Cohorts by Place in Iowa

There are 1,008 places in Iowa. This section compares Martinsburg to the 50 most populous places in Iowa and to those entities that contain or substantially overlap with Martinsburg. The least populous of the compared places has a population of 7,876.

Children by Place#23

Percentage of population aged 0 to 17 (%):
Scope: population of Martinsburg, selected other places in Iowa, and entities that contain Martinsburg
0%10%20%30%Count#Steady Run TownshipSteady RunGrimesMartinsburgWaukeeDenisonPerryNorth Liberty080400-1B.G. 080400-1AltoonaAnkenyNorwalkStorm LakeCliveJohnstonMarshalltownMuscatineMarionSioux CityBettendorfUrbandaleDes MoinesLe MarsZIP Code 52563ZIP 52563IndianolaKeokukCarrollBurlingtonWaterlooWest North CentralDavenportSpencerPleasant HillIowaCrestonCouncil BluffsOttumwaMidwestNewtonUnited States of AmericaUnited StatesCedar RapidsKeokuk CountyKeokukPellaCoralvillePekin Community School DistrictPekinOskaloosaWest Des MoinesW Des Moines080400Tract 080400Mount PleasantMt PleasantClintonBooneFort MadisonMason CityFort DodgeDubuqueWaverlyGrinnellFairfieldCedar FallsIowa CityAmesDecorah33.105023%33.105023%33.1%14532.431395%32.431395%32.4%3,380132.000000%32.000000%32.0%4031.772339%31.772339%31.8%5,387230.290656%30.290656%30.3%2,522328.504317%28.504317%28.5%2,245428.208902%28.208902%28.2%4,791527.899687%27.899687%27.9%17827.875629%27.875629%27.9%4,653627.824687%27.824687%27.8%14,86214.9k727.473854%27.473854%27.5%2,732827.405275%27.405275%27.4%2,951927.388086%27.388086%27.4%4,6621027.043251%27.043251%27.0%5,2711126.091833%26.091833%26.1%7,2111226.006943%26.006943%26.0%6,2181325.896554%25.896554%25.9%9,6331425.773595%25.773595%25.8%21,30621.3k1525.530701%25.530701%25.5%8,9481625.426908%25.426908%25.4%10,57210.6k1724.908508%24.908508%24.9%53,02053.0k1824.740484%24.740484%24.7%2,4311924.677003%24.677003%24.7%38224.460666%24.460666%24.5%3,7532023.852089%23.852089%23.9%2,5352123.813814%23.813814%23.8%2,3792223.799623%23.799623%23.8%6,0672323.725441%23.725441%23.7%16,21816.2k2423.689691%23.689691%23.7%4,971,0164.97M23.631299%23.631299%23.6%24,17624.2k2523.630505%23.630505%23.6%2,6402623.601956%23.601956%23.6%2,2202723.418418%23.418418%23.4%727,514728k23.257585%23.257585%23.3%1,8322823.227866%23.227866%23.2%14,47714.5k2923.218261%23.218261%23.2%5,7373023.217458%23.217458%23.2%15,712,75815.7M23.127899%23.127899%23.1%3,4903123.108006%23.108006%23.1%73,612,43873.6M22.994202%22.994202%23.0%29,78629.8k3222.962673%22.962673%23.0%2,35022.908560%22.908560%22.9%2,3553322.581930%22.581930%22.6%4,5343422.543353%22.543353%22.5%81922.352227%22.352227%22.4%2,5793522.340322%22.340322%22.3%13,76713.8k3621.876145%21.876145%21.9%59721.705335%21.705335%21.7%1,8433721.500688%21.500688%21.5%5,6223821.302244%21.302244%21.3%2,6863921.069737%21.069737%21.1%2,2694021.048428%21.048428%21.0%5,7984121.014375%21.014375%21.0%5,1754220.761937%20.761937%20.8%12,15312.2k4320.549308%20.549308%20.5%2,0654419.304214%19.304214%19.3%1,7594519.201368%19.201368%19.2%1,9094617.796610%17.796610%17.8%7,2664715.598536%15.598536%15.6%11,29111.3k4812.309397%12.309397%12.3%7,8874910.732624%10.732624%10.7%85750
Count number of children
# rank of place out of 50 by %

Age Cohorts by Place in the Midwest

There are 9,721 places in the Midwest. This section compares Martinsburg to the 50 most populous places in the Midwest and to those entities that contain or substantially overlap with Martinsburg. The least populous of the compared places has a population of 95,520.

Children by Place#32

Percentage of population aged 0 to 17 (%):
Scope: population of Martinsburg, selected other places in the Midwest, and entities that contain Martinsburg
0%10%20%30%Count#Steady Run TownshipSteady RunMartinsburgAuroraDearbornOlatheJolietKansas CityElgin080400-1B.G. 080400-1South BendMilwaukeeNapervilleKenoshaFlintWichitaFort WayneRockfordSt. PaulDetroitPeoriaOmahaDes MoinesIndianapolisSioux FallsZIP Code 52563ZIP 52563Green BayRochesterGrand RapidsLansingTopekaWest North CentralDavenportIowaKansas CityToledoOverland ParkMidwestUnited States of AmericaUnited StatesClevelandCedar RapidsKeokuk CountyKeokukWarrenColumbusLincolnPekin Community School DistrictPekinIndependenceSpringfieldDaytonCincinnatiChicago080400Tract 080400EvansvilleAkronSt. LouisSterling HeightsSterling HtsMinneapolisFargoColumbiaSpringfieldMadisonAnn Arbor33.105023%33.105023%33.1%14532.000000%32.000000%32.0%4030.107463%30.107463%30.1%60,48860.5k129.337312%29.337312%29.3%28,02328.0k229.310098%29.310098%29.3%38,92038.9k328.547605%28.547605%28.5%42,11242.1k428.278188%28.278188%28.3%42,34842.3k527.918405%27.918405%27.9%31,24631.2k627.899687%27.899687%27.9%17827.834358%27.834358%27.8%28,12328.1k726.475933%26.475933%26.5%158,504159k826.450555%26.450555%26.5%38,56238.6k926.120262%26.120262%26.1%26,08526.1k1026.042783%26.042783%26.0%25,76125.8k1125.967894%25.967894%26.0%100,764101k1225.839420%25.839420%25.8%67,42967.4k1325.506528%25.506528%25.5%38,15738.2k1425.318684%25.318684%25.3%75,23775.2k1525.218343%25.218343%25.2%172,353172k1625.069403%25.069403%25.1%29,07829.1k1725.047396%25.047396%25.0%110,978111k1824.908508%24.908508%24.9%53,02053.0k1924.805415%24.805415%24.8%210,021210k2024.789140%24.789140%24.8%41,61741.6k2124.677003%24.677003%24.7%38224.560033%24.560033%24.6%25,77625.8k2224.207332%24.207332%24.2%26,96627.0k2323.914961%23.914961%23.9%46,36846.4k2423.889765%23.889765%23.9%27,41927.4k2523.720503%23.720503%23.7%30,23730.2k2623.689691%23.689691%23.7%4,971,0164.97M23.631299%23.631299%23.6%24,17624.2k2723.418418%23.418418%23.4%727,514728k23.365136%23.365136%23.4%110,229110k2823.297870%23.297870%23.3%65,43365.4k2923.297511%23.297511%23.3%42,81542.8k3023.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M22.998471%22.998471%23.0%89,50289.5k3122.994202%22.994202%23.0%29,78629.8k3222.962673%22.962673%23.0%2,35022.854245%22.854245%22.9%30,86930.9k3322.726089%22.726089%22.7%190,226190k3422.619388%22.619388%22.6%61,75561.8k3522.543353%22.543353%22.5%81922.480528%22.480528%22.5%26,35126.4k3622.468628%22.468628%22.5%26,23126.2k3722.121536%22.121536%22.1%31,22331.2k3822.113949%22.113949%22.1%65,90265.9k3921.913385%21.913385%21.9%594,733595k4021.876145%21.876145%21.9%59721.775858%21.775858%21.8%26,16526.2k4121.641949%21.641949%21.6%42,96143.0k4220.242382%20.242382%20.2%63,97264.0k4320.047997%20.047997%20.0%26,39826.4k4419.962439%19.962439%20.0%80,78280.8k4519.917206%19.917206%19.9%23,09423.1k4618.454317%18.454317%18.5%21,62221.6k4718.124235%18.124235%18.1%29,93029.9k4817.137062%17.137062%17.1%42,16342.2k4913.862661%13.862661%13.9%16,37016.4k50
Count number of children
# rank of place out of 50 by %

Age Cohorts by Place in the United States

There are 29,322 places in the United States. This section compares Martinsburg to the 50 most populous places in the United States and to those entities that contain or substantially overlap with Martinsburg. The least populous of the compared places has a population of 383,899.

Children by Place#41

Percentage of population aged 0 to 17 (%):
Scope: population of Martinsburg, selected other places in the United States, and entities that contain Martinsburg
0%10%20%30%Count#Steady Run TownshipSteady RunMartinsburgFresnoFort Worth080400-1B.G. 080400-1El PasoPhoenixMilwaukeeArlingtonWichitaOklahoma CitySan AntonioDallasHoustonMemphisDetroitOmahaIndianapolisZIP Code 52563ZIP 52563TulsaCharlotteMesaLong BeachLas VegasColorado SpringsColorado SpgsSacramentoWest North CentralSan JoseIowaKansas CityMidwestAlbuquerqueJacksonvilleUnited States of AmericaUnited StatesClevelandKeokuk CountyKeokukLouisvilleVirginia BeachVirginia BchColumbusPekin Community School DistrictPekinPhiladelphiaChicago080400Tract 080400RaleighTucsonLos AngelesNashville-DavidsonAustinNew YorkBaltimoreDenverSan DiegoOaklandMinneapolisAtlantaPortlandMiamiWashingtonBostonSeattleSan Francisco33.105023%33.105023%33.1%14532.000000%32.000000%32.0%4029.163869%29.163869%29.2%149,846150k128.577574%28.577574%28.6%233,173233k227.899687%27.899687%27.9%17827.481425%27.481425%27.5%186,340186k326.837431%26.837431%26.8%417,409417k426.475933%26.475933%26.5%158,504159k526.113118%26.113118%26.1%100,248100k625.967894%25.967894%26.0%100,764101k725.770022%25.770022%25.8%159,778160k825.703473%25.703473%25.7%369,965370k925.650464%25.650464%25.7%327,924328k1025.319180%25.319180%25.3%567,297567k1125.310548%25.310548%25.3%166,001166k1225.218343%25.218343%25.2%172,353172k1325.047396%25.047396%25.0%110,978111k1424.805415%24.805415%24.8%210,021210k1524.677003%24.677003%24.7%38224.623036%24.623036%24.6%98,46998.5k1624.540635%24.540635%24.5%198,493198k1724.297490%24.297490%24.3%114,309114k1824.070388%24.070388%24.1%113,081113k1923.976553%23.976553%24.0%147,047147k2023.968990%23.968990%24.0%107,563108k2123.750232%23.750232%23.8%115,077115k2223.689691%23.689691%23.7%4,971,0164.97M23.475697%23.475697%23.5%236,955237k2323.418418%23.418418%23.4%727,514728k23.365136%23.365136%23.4%110,229110k2423.217458%23.217458%23.2%15,712,75815.7M23.208388%23.208388%23.2%129,238129k2523.157634%23.157634%23.2%198,372198k2623.108006%23.108006%23.1%73,612,43873.6M22.998471%22.998471%23.0%89,50289.5k2722.962673%22.962673%23.0%2,35022.928906%22.928906%22.9%140,227140k2822.855339%22.855339%22.9%102,788103k2922.726089%22.726089%22.7%190,226190k3022.543353%22.543353%22.5%81922.168125%22.168125%22.2%345,809346k3121.913385%21.913385%21.9%594,733595k3221.876145%21.876145%21.9%59721.865242%21.865242%21.9%96,49796.5k3321.726884%21.726884%21.7%114,628115k3421.605988%21.605988%21.6%846,711847k3521.537938%21.537938%21.5%138,655139k3621.399702%21.399702%21.4%194,262194k3721.199117%21.199117%21.2%1,793,8611.79M3821.123671%21.123671%21.1%131,178131k3920.705017%20.705017%20.7%137,337137k4020.651042%20.651042%20.7%283,913284k4120.390011%20.390011%20.4%84,01584.0k4219.962439%19.962439%20.0%80,78280.8k4318.722638%18.722638%18.7%85,44685.4k4418.415892%18.415892%18.4%114,287114k4517.996773%17.996773%18.0%77,85877.9k4617.402645%17.402645%17.4%114,685115k4716.549062%16.549062%16.5%108,939109k4815.290895%15.290895%15.3%102,273102k4913.481174%13.481174%13.5%114,628115k50
Count number of children
# rank of place 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.

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State:
Iowa
County:
Keokuk
Township:
Steady Run
ZIP Code:
52563
Unified School District:
Pekin
Congressional District:
IA-2
State Senate District:
IA-39
State House District:
IA-78
Nearby Cities:
Agency, Delta, Fremont, Hayesville, Hedrick, Kirkville, Ollie, Packwood, Richland, Sigourney