Age and Sex in Rock Falls, 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, Rock Falls, and other places in Iowa
Rock Falls
Iowa
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0.0%0.5%1.0%1.5%2.0%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-410.667%0.67%85.333%5.33%64.000%4.00%96.000%6.00%85.333%5.33%00.000%0%42.667%2.67%53.333%3.33%138.667%8.67%1812.000%12.0%74.667%4.67%128.000%8.00%138.667%8.67%42.667%2.67%21.333%1.33%117.333%7.33%00.000%0%00.000%0%21.333%1.33%00.000%0%117.333%7.33%85.333%5.33%85.333%5.33%

Age and Sex#2

Percentage in each age cohort per year of age.1
Scope: population of Iowa and Rock Falls
Female Male
Iowa
Rock Falls
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%Senior2Older Adult3Younger Adult4College5Children6-0.259259%-0.074074%-0.192490%-0.053856%-0.333333%0.33%0.259259%0.192490%0.259259%0.26%3221.333%21.3%-0.720000%-0.133333%-0.638182%-0.853333%0.85%0.720000%0.638182%0.001353%0.720000%0.72%5939.333%39.3%-0.370370%-0.619125%-0.370370%0.37%0.370370%0.370370%0.619125%0.025145%0.740741%0.74%3020.000%20.0%-0.000000%-0.333333%-0.735381%-0.333333%0.33%0.000000%0.735381%0.054111%0.000000%0.00%21.333%1.33%-0.481481%-0.634612%-0.481481%0.48%0.481481%0.037037%0.634612%0.031800%0.518519%0.52%2718.000%18.0%

Detailed Age and Sex#3

Percentage in each age cohort per year of age.1
Scope: population of Iowa and Rock Falls
Female Male
Iowa
Rock Falls
Shaded bar tips show excess over facing bar.
2%1%0%1%2%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%0.041667%0.051411%0.041667%0.0%10.667%0.67%-0.266667%-0.533333%-0.174468%-0.075066%-0.800000%0.8%0.266667%0.174468%0.266667%0.3%85.333%5.33%-0.000000%-0.248144%-0.065989%0.000000%0.0%0.000000%0.800000%0.248144%0.800000%0.8%64.000%4.00%-0.533333%-0.133333%-0.334521%-0.038389%-0.666667%0.7%0.533333%0.334521%0.533333%0.5%96.000%6.00%-0.222222%-1.333333%-0.424367%-0.036879%-1.555556%1.6%0.222222%0.424367%0.222222%0.2%85.333%5.33%-0.000000%-0.524144%-0.037115%0.000000%0.0%0.000000%0.000000%0.524144%0.000000%0.0%00.000%0%-0.000000%-0.595229%-0.000536%0.000000%0.0%0.000000%0.888889%0.595229%0.888889%0.9%42.667%2.67%-0.666667%-0.333333%-0.663219%-0.010462%-1.000000%1.0%0.666667%0.663219%0.666667%0.7%53.333%3.33%-0.800000%-0.675983%-0.012541%-0.800000%0.8%0.800000%0.133333%0.675983%0.933333%0.9%138.667%8.67%-0.933333%-0.533333%-0.690906%-0.006245%-1.466667%1.5%0.933333%0.690906%0.933333%0.9%1812.000%12.0%-0.133333%-0.666667%-0.607007%-0.800000%0.8%0.133333%0.607007%0.012683%0.133333%0.1%74.667%4.67%-0.800000%-0.571295%-0.800000%0.8%0.800000%0.000000%0.571295%0.017376%0.800000%0.8%128.000%8.00%-0.800000%-0.133333%-0.587487%-0.933333%0.9%0.800000%0.587487%0.012483%0.800000%0.8%138.667%8.67%-0.133333%-0.628104%-0.133333%0.1%0.133333%0.266667%0.628104%0.026170%0.400000%0.4%42.667%2.67%-0.000000%-0.266667%-0.601386%-0.266667%0.3%0.000000%0.601386%0.033864%0.000000%0.0%21.333%1.33%-0.000000%-0.686455%0.000000%0.0%0.000000%2.444444%0.686455%0.030011%2.444444%2.4%117.333%7.33%-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%0.000000%0.770169%0.056074%0.000000%0.0%00.000%0%-0.000000%-0.666667%-0.718956%-0.666667%0.7%0.000000%0.718956%0.056734%0.000000%0.0%21.333%1.33%-0.000000%-0.640338%0.000000%0.0%0.000000%0.000000%0.640338%0.030076%0.000000%0.0%00.000%0%-0.133333%-0.639003%-0.133333%0.1%0.133333%1.200000%0.639003%0.033033%1.333333%1.3%117.333%7.33%-0.266667%-0.533333%-0.643465%-0.800000%0.8%0.266667%0.643465%0.031842%0.266667%0.3%85.333%5.33%-0.266667%-0.533333%-0.617932%-0.800000%0.8%0.266667%0.617932%0.031559%0.266667%0.3%85.333%5.33%

Detailed Sex Ratio#4

Percentage more males or females in selected age cohorts.
Scope: population of Iowa and Rock Falls
More Females More Males
Iowa
Rock Falls
1,000%500%0%500%M:FFM80-8470-7467-6960-6155-5950-5445-4940-4435-3930-3425-2918-1910-145-90-4-200.000000%-43.025830%-200.000000%200.0%0.3330.3375.000%75.0%25.000%25.0%-25.000000%-11.475915%-25.000000%25.0%0.8000.8055.556%55.6%44.444%44.4%-600.000000%-8.690265%-600.000000%600.0%0.1430.1487.500%87.5%12.500%12.5%-50.000000%-1.577402%-50.000000%50.0%0.6670.6760.000%60.0%40.000%40.0%-1.855238%16.666667%16.666667%16.7%1.1671.1746.154%46.2%53.846%53.8%-57.142857%-0.903856%-57.142857%57.1%0.6360.6461.111%61.1%38.889%38.9%-500.000000%-500.000000%500.0%2.089388%0.1670.1785.714%85.7%14.286%14.3%0.000000%0.000000%0.0%3.041504%1.0001.0050.000%50.0%50.000%50.0%-16.666667%-16.666667%16.7%2.124838%0.8570.8653.846%53.8%46.154%46.2%200.000000%4.166539%200.000000%200.0%3.0003.0025.000%25.0%75.000%75.0%-1,000.000000%-1,000.000000%> 1000%5.630908%0.0000100.000%100%0.000%0%-1,000.000000%-1,000.000000%> 1000%7.891202%0.0000100.000%100%0.000%0%900.000000%5.169461%900.000000%900.0%10.00010.09.091%9.09%90.909%90.9%-200.000000%-200.000000%200.0%4.948524%0.3330.3375.000%75.0%25.000%25.0%-200.000000%-200.000000%200.0%5.107154%0.3330.3375.000%75.0%25.000%25.0%

Map of Age Cohorts by Block in Rock Falls

Children Age Cohorts by Block#5

Percentage of population aged 0 to 17 (%):
0%7%13%20%27%34%

College Age Cohorts by Block#6

Percentage of population aged 18 to 21 (%):
0.0%2.5%5.0%7.5%10.0%12.5%

20s Age Cohorts by Block#7

Percentage of population aged 22 to 29 (%):
0%7%13%20%27%34%

30s Age Cohorts by Block#8

Percentage of population aged 30 to 39 (%):
0%13%27%40%53%67%

40s Age Cohorts by Block#9

Percentage of population aged 40 to 49 (%):
0%8%17%25%33%42%

50s Age Cohorts by Block#10

Percentage of population aged 50 to 59 (%):
0%13%27%40%53%67%

60s Age Cohorts by Block#11

Percentage of population aged 60 to 69 (%):
0%14%28%42%56%70%

70s Age Cohorts by Block#12

Percentage of population aged 70 to 79 (%):
0%20%40%60%80%100%

80+ Age Cohorts by Block#13

Percentage of population aged 80 and older (%):
0%7%13%20%27%34%
Road Data ©OpenStreetMap

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Age Cohorts by Place in the Mason City Area

There are 21 places in the Mason City Area. This section compares Rock Falls to all of the places in the Mason City Area and to those entities that contain or substantially overlap with Rock Falls.

Children by Place#14

Percentage of population aged 0 to 17 (%):
Scope: population of Rock Falls, selected other places in the Mason City Area, and entities that contain Rock Falls
0%20%40%60%Count#BolanBurchinalDoughertyManlySwaledaleNora SpringsWest North CentralIowaMidwestUnited States of AmericaUnited StatesRockwellThorntonCentral Springs Community School DistrictCntrl SpgsNorthwoodClear LakeMason CityMason City Metro AreaMason CityCerro Gordo CountyCerro GordoHanlontownFertile950600-2B.G. 950600-2Falls TownshipFallsGrafton950600Tract 950600PlymouthRock FallsJoiceMeserveyVenturaKensettPortland60.000000%60.000000%60.0%24152.830189%52.830189%52.8%28226.562500%26.562500%26.6%17326.176660%26.176660%26.2%406425.414365%25.414365%25.4%46523.867262%23.867262%23.9%374623.689691%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%73,612,43873.6M23.000000%23.000000%23.0%253722.614108%22.614108%22.6%109821.964059%21.964059%22.0%1,21021.802175%21.802175%21.8%421921.376243%21.376243%21.4%1,6341021.048428%21.048428%21.0%5,7981120.904355%20.904355%20.9%10,63310.6k20.804563%20.804563%20.8%9,00920.379147%20.379147%20.4%431219.942197%19.942197%19.9%691319.894737%19.894737%19.9%18919.090909%19.090909%19.1%18918.873239%18.873239%18.9%671418.532455%18.532455%18.5%39418.023256%18.023256%18.0%621518.000000%18.000000%18.0%271616.410256%16.410256%16.4%321716.384181%16.384181%16.4%291815.468114%15.468114%15.5%1141914.492754%14.492754%14.5%50200.000000%0.000000%0.0%021

Age Cohorts by Place in Iowa

There are 1,008 places in Iowa. This section compares Rock Falls to the 50 most populous places in Iowa and to those entities that contain or substantially overlap with Rock Falls. 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 Rock Falls, selected other places in Iowa, and entities that contain Rock Falls
0%10%20%30%Count#GrimesWaukeeDenisonPerryNorth LibertyAltoonaAnkenyNorwalkStorm LakeCliveJohnstonMarshalltownMuscatineMarionSioux CityBettendorfUrbandaleDes MoinesLe MarsIndianolaKeokukCarrollBurlingtonWaterlooWest North CentralDavenportSpencerPleasant HillIowaCrestonCouncil BluffsOttumwaMidwestNewtonUnited States of AmericaUnited StatesCedar RapidsPellaCoralvilleOskaloosaWest Des MoinesW Des MoinesCentral Springs Community School DistrictCntrl SpgsMount PleasantMt PleasantClintonBooneFort MadisonMason CityFort DodgeMason City Metro AreaMason CityCerro Gordo CountyCerro GordoDubuqueWaverly950600-2B.G. 950600-2GrinnellFairfieldFalls TownshipFalls950600Tract 950600Rock FallsCedar FallsIowa CityAmesDecorah32.431395%32.431395%32.4%3,380131.772339%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%4,791527.875629%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%2,4311924.460666%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%29,78629.8k3222.908560%22.908560%22.9%2,3553322.581930%22.581930%22.6%4,5343422.352227%22.352227%22.4%2,5793522.340322%22.340322%22.3%13,76713.8k3621.964059%21.964059%22.0%1,21021.705335%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%5,1754220.904355%20.904355%20.9%10,63310.6k20.804563%20.804563%20.8%9,00920.761937%20.761937%20.8%12,15312.2k4320.549308%20.549308%20.5%2,0654419.894737%19.894737%19.9%18919.304214%19.304214%19.3%1,7594519.201368%19.201368%19.2%1,9094619.090909%19.090909%19.1%18918.532455%18.532455%18.5%39418.000000%18.000000%18.0%2717.796610%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

Age Cohorts by Place in the Midwest

There are 9,721 places in the Midwest. This section compares Rock Falls to the 50 most populous places in the Midwest and to those entities that contain or substantially overlap with Rock Falls. 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 Rock Falls, selected other places in the Midwest, and entities that contain Rock Falls
0%10%20%30%Count#AuroraDearbornOlatheJolietKansas CityElginSouth BendMilwaukeeNapervilleKenoshaFlintWichitaFort WayneRockfordSt. PaulDetroitPeoriaOmahaDes MoinesIndianapolisSioux FallsGreen BayRochesterGrand RapidsLansingTopekaWest North CentralDavenportIowaKansas CityToledoOverland ParkMidwestUnited States of AmericaUnited StatesClevelandCedar RapidsWarrenColumbusLincolnIndependenceSpringfieldDaytonCincinnatiCentral Springs Community School DistrictCntrl SpgsChicagoEvansvilleAkronMason City Metro AreaMason CityCerro Gordo CountyCerro GordoSt. LouisSterling HeightsSterling HtsMinneapolisFargo950600-2B.G. 950600-2Falls TownshipFalls950600Tract 950600ColumbiaSpringfieldRock FallsMadisonAnn Arbor30.107463%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%31,24631.2k627.834358%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%41,61741.6k2124.560033%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%29,78629.8k3222.854245%22.854245%22.9%30,86930.9k3322.726089%22.726089%22.7%190,226190k3422.619388%22.619388%22.6%61,75561.8k3522.480528%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%65,90265.9k3921.964059%21.964059%22.0%1,21021.913385%21.913385%21.9%594,733595k4021.775858%21.775858%21.8%26,16526.2k4121.641949%21.641949%21.6%42,96143.0k4220.904355%20.904355%20.9%10,63310.6k20.804563%20.804563%20.8%9,00920.242382%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%23,09423.1k4619.894737%19.894737%19.9%18919.090909%19.090909%19.1%18918.532455%18.532455%18.5%39418.454317%18.454317%18.5%21,62221.6k4718.124235%18.124235%18.1%29,93029.9k4818.000000%18.000000%18.0%2717.137062%17.137062%17.1%42,16342.2k4913.862661%13.862661%13.9%16,37016.4k50

Age Cohorts by Place in the United States

There are 29,322 places in the United States. This section compares Rock Falls to the 50 most populous places in the United States and to those entities that contain or substantially overlap with Rock Falls. 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 Rock Falls, selected other places in the United States, and entities that contain Rock Falls
0%10%20%Count#FresnoFort WorthEl PasoPhoenixMilwaukeeArlingtonWichitaOklahoma CitySan AntonioDallasHoustonMemphisDetroitOmahaIndianapolisTulsaCharlotteMesaLong BeachLas VegasColorado SpringsColorado SpgsSacramentoWest North CentralSan JoseIowaKansas CityMidwestAlbuquerqueJacksonvilleUnited States of AmericaUnited StatesClevelandLouisvilleVirginia BeachVirginia BchColumbusPhiladelphiaCentral Springs Community School DistrictCntrl SpgsChicagoRaleighTucsonLos AngelesNashville-DavidsonAustinNew YorkBaltimoreMason City Metro AreaMason CityCerro Gordo CountyCerro GordoDenverSan DiegoOaklandMinneapolis950600-2B.G. 950600-2Falls TownshipFallsAtlanta950600Tract 950600PortlandRock FallsMiamiWashingtonBostonSeattleSan Francisco29.163869%29.163869%29.2%149,846150k128.577574%28.577574%28.6%233,173233k227.481425%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%210,021210k1524.623036%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%89,50289.5k2722.928906%22.928906%22.9%140,227140k2822.855339%22.855339%22.9%102,788103k2922.726089%22.726089%22.7%190,226190k3022.168125%22.168125%22.2%345,809346k3121.964059%21.964059%22.0%1,21021.913385%21.913385%21.9%594,733595k3221.865242%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%131,178131k3920.904355%20.904355%20.9%10,63310.6k20.804563%20.804563%20.8%9,00920.705017%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%80,78280.8k4319.894737%19.894737%19.9%18919.090909%19.090909%19.1%18918.722638%18.722638%18.7%85,44685.4k4418.532455%18.532455%18.5%39418.415892%18.415892%18.4%114,287114k4518.000000%18.000000%18.0%2717.996773%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

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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