Age and Sex in the Rockford Township, Perkins County, South Dakota (Township)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the county subdivisions in Perkins County.
Scope: population of Perkins County, the Rockford Township, and other county subdivisions in Perkins County
Rockford Township
0%2%4%6%8%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-400.000%0%00.000%0%00.000%0%00.000%0%28.333%8.33%00.000%0%00.000%0%312.500%12.5%1250.000%50.0%00.000%0%00.000%0%00.000%0%28.333%8.33%00.000%0%28.333%8.33%00.000%0%00.000%0%00.000%0%00.000%0%00.000%0%14.167%4.17%28.333%8.33%00.000%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 Perkins County and the Rockford Township
Female Male
Perkins County
Rockford Township
Shaded bar tips show excess over facing bar.
1%0%1%Count%Senior2Older Adult3Younger Adult4College5Children6-0.115741%-0.310993%-0.115741%0.1%0.115741%0.000000%0.310993%0.001840%0.115741%0.1%28.333%8.33%-1.000000%-0.684995%-0.002650%-1.000000%1.0%1.000000%0.500000%0.684995%1.500000%1.5%1562.500%62.5%-0.231481%-0.509735%-0.023923%-0.231481%0.2%0.231481%0.462963%0.509735%0.694444%0.7%416.667%16.7%-0.000000%-0.107652%0.000000%0.0%0.000000%0.000000%0.107652%0.571381%0.000000%0.0%00.000%0%-0.231481%-0.574142%-0.231481%0.2%0.231481%0.231481%0.574142%0.034964%0.462963%0.5%312.500%12.5%
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 Perkins County and the Rockford Township
Female Male
Perkins County
Rockford Township
Shaded bar tips show excess over facing bar.
6%4%2%0%2%4%6%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%-0.153196%-0.020702%0.000000%0.0%0.000000%0.000000%0.153196%0.000000%0.0%00.000%0%-0.000000%-0.251739%-0.158993%0.000000%0.0%0.000000%0.000000%0.251739%0.000000%0.0%00.000%0%-0.000000%-0.364359%-0.026499%0.000000%0.0%0.000000%0.000000%0.364359%0.000000%0.0%00.000%0%-0.000000%-0.357734%0.000000%0.0%0.000000%0.000000%0.357734%0.145744%0.000000%0.0%00.000%0%-1.388889%-0.441647%-1.388889%1.4%1.388889%0.000000%0.441647%0.253947%1.388889%1.4%28.333%8.33%-0.000000%-0.563100%-0.082809%0.000000%0.0%0.000000%0.000000%0.563100%0.000000%0.0%00.000%0%-0.000000%-0.596224%0.000000%0.0%0.000000%0.000000%0.596224%0.077288%0.000000%0.0%00.000%0%-0.000000%-0.794965%0.000000%0.0%0.000000%6.250000%0.794965%0.248427%6.250000%6.3%312.500%12.5%-5.000000%-0.940709%-0.013249%-5.000000%5.0%5.000000%0.000000%0.940709%5.000000%5.0%1250.000%50.0%-0.000000%-0.728718%0.000000%0.0%0.000000%0.000000%0.728718%0.086121%0.000000%0.0%00.000%0%-0.000000%-0.344485%-0.291487%0.000000%0.0%0.000000%0.000000%0.344485%0.000000%0.0%00.000%0%-0.000000%-0.443856%0.000000%0.0%0.000000%0.000000%0.443856%0.059622%0.000000%0.0%00.000%0%-0.000000%-0.529977%0.000000%0.0%0.000000%1.666667%0.529977%0.046373%1.666667%1.7%28.333%8.33%-0.000000%-0.516727%0.000000%0.0%0.000000%0.000000%0.516727%0.092746%0.000000%0.0%00.000%0%-0.833333%-0.430606%-0.013249%-0.833333%0.8%0.833333%0.000000%0.430606%0.833333%0.8%28.333%8.33%-0.000000%-0.364359%-0.353318%0.000000%0.0%0.000000%0.000000%0.364359%0.000000%0.0%00.000%0%-0.000000%-0.000000%0.000000%0.0%0.000000%0.000000%0.000000%0.165618%0.000000%0.0%00.000%0%-0.000000%-0.000000%0.000000%0.0%0.000000%0.000000%0.000000%1.788672%0.000000%0.0%00.000%0%-0.000000%-0.215303%0.000000%0.0%0.000000%0.000000%0.215303%0.165618%0.000000%0.0%00.000%0%-0.000000%-0.364359%0.000000%0.0%0.000000%0.000000%0.364359%0.320194%0.000000%0.0%00.000%0%-0.000000%-0.833333%-0.629347%-0.013249%-0.833333%0.8%0.000000%0.629347%0.000000%0.0%14.167%4.17%-0.000000%-0.563100%0.000000%0.0%0.000000%1.666667%0.563100%0.145744%1.666667%1.7%28.333%8.33%-0.000000%-0.443856%-0.198741%0.000000%0.0%0.000000%0.000000%0.443856%0.000000%0.0%00.000%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 Perkins County and the Rockford Township
More Females More Males
Perkins County
Rockford Township
1,000%500%0%M:FFM67-6955-5925-2910-140.000000%0.000000%0.0%57.500000%1.0001.0050.000%50.0%50.000%50.0%0.000000%-1.408451%0.000000%0.0%1.0001.0050.000%50.0%50.000%50.0%0.000000%-3.076923%0.000000%0.0%1.0001.0050.000%50.0%50.000%50.0%-1,000.000000%-2.105263%-1,000.000000%> 1000%0.0000100.000%100%0.000%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 the Rockford Township

Children Age Cohorts by Block#5

Percentage of population aged 0 to 17 (%):
0%10%20%30%40%50%

20s Age Cohorts by Block#7

Percentage of population aged 22 to 29 (%):
0.0%1.5%3.1%4.6%6.2%7.7%

30s Age Cohorts by Block#8

Percentage of population aged 30 to 39 (%):
0.0%4.6%9.2%13.8%18.5%23.1%

50s Age Cohorts by Block#10

Percentage of population aged 50 to 59 (%):
0%20%40%60%80%100%

60s Age Cohorts by Block#11

Percentage of population aged 60 to 69 (%):
0.0%4.6%9.2%13.8%18.5%23.1%

80+ Age Cohorts by Block#13

Percentage of population aged 80 and older (%):
0%20%40%60%80%100%
Road Data ©OpenStreetMap

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Age Cohorts by County Subdivision in South Dakota

There are 1,335 county subdivisions in South Dakota. This section compares the Rockford Township to the 50 most populous county subdivisions in South Dakota and to those entities that contain or substantially overlap with the Rockford Township. The least populous of the compared county subdivisions has a population of 2,278.

Children by County Subdivision#14

Percentage of population aged 0 to 17 (%):
Scope: population of the Rockford Township, selected other county subdivisions in South Dakota, and entities that contain the Rockford Township
0%10%20%30%40%Count#West ToddEast CorsonEast Oglala LakotaE Oglala LakotaEast ToddNorth DeweyHarrisburgWest Oglala LakotaW Oglala LakotaTeaBrandonHartfordDell RapidsBox ElderSissetonSioux FallsSplit Rock TownshipSplit RockWest HughesSpringdale TownshipSpringdaleWest ButteBig Sioux TownshipBig SiouxHuronCentral PenningtonCntrl PenningtonChamberlainBox ElderSouth DakotaWatertownSioux FallsBelle FourcheWest North CentralRapid CitySturgisFort PierreAberdeenMidwestRedfieldUnited States of AmericaUnited StatesMitchellWinnerMadisonCantonPierreLeadBison School District 52-1Bison 52-1North Sioux CityN Sioux CityYanktonWest YanktonPerkins CountyPerkins968300Tract 968300MilbankZIP Code 57638ZIP 57638MobridgeSpearfishWest CusterSouthwest MeadeSW MeadeMount RushmoreMt RushmoreBrookingsNorth LawrenceN LawrenceHot SpringsVermillion968300-1B.G. 968300-1Rockford TownshipRockford40.204966%40.204966%40.2%2,040139.915156%39.915156%39.9%1,035238.953694%38.953694%39.0%2,204338.696211%38.696211%38.7%1,205438.562640%38.562640%38.6%1,379537.609671%37.609671%37.6%1,929637.040528%37.040528%37.0%3,144736.927398%36.927398%36.9%1,709833.109365%33.109365%33.1%3,203932.080537%32.080537%32.1%9561030.067295%30.067295%30.1%1,1171129.353398%29.353398%29.4%1,7751229.045488%29.045488%29.0%7791328.068158%28.068158%28.1%6,8361427.532629%27.532629%27.5%8861527.411765%27.411765%27.4%6991627.257094%27.257094%27.3%6341727.196653%27.196653%27.2%6501827.129788%27.129788%27.1%9491926.648414%26.648414%26.6%3,5042026.613546%26.613546%26.6%3,6742126.333584%26.333584%26.3%7012226.274765%26.274765%26.3%8092324.629931%24.629931%24.6%209,615210k24.375738%24.375738%24.4%5,3692424.232733%24.232733%24.2%34,78134.8k2523.981742%23.981742%24.0%1,3662623.689691%23.689691%23.7%4,971,0164.97M23.561243%23.561243%23.6%17,06817.1k2723.483833%23.483833%23.5%1,5762823.353819%23.353819%23.4%5322923.302019%23.302019%23.3%6,4743023.217458%23.217458%23.2%15,712,75815.7M23.212321%23.212321%23.2%6333123.108006%23.108006%23.1%73,612,43873.6M22.953235%22.953235%23.0%3,5833222.898347%22.898347%22.9%6513322.870018%22.870018%22.9%1,6243422.686025%22.686025%22.7%7503522.458629%22.458629%22.5%3,1353622.327869%22.327869%22.3%6813722.171946%22.171946%22.2%19621.578345%21.578345%21.6%5663821.522112%21.522112%21.5%3,1393921.372106%21.372106%21.4%7574021.298443%21.298443%21.3%64321.298443%21.298443%21.3%64320.602706%20.602706%20.6%6704120.020070%20.020070%20.0%39919.421965%19.421965%19.4%6724219.362921%19.362921%19.4%2,1644318.435880%18.435880%18.4%8184418.351184%18.351184%18.4%2,0394518.319116%18.319116%18.3%1,3104617.624077%17.624077%17.6%4,1054717.436333%17.436333%17.4%1,0274817.086835%17.086835%17.1%6104914.910002%14.910002%14.9%1,6075013.848921%13.848921%13.8%7712.500000%12.500000%12.5%3
Count number of children
# rank of county subdivision out of 50 by %

Age Cohorts by County Subdivision in the Midwest

There are 19,478 county subdivisions in the Midwest. This section compares the Rockford Township to the 50 most populous county subdivisions in the Midwest and to those entities that contain or substantially overlap with the Rockford Township. The least populous of the compared county subdivisions has a population of 112,821.

Children by County Subdivision#23

Percentage of population aged 0 to 17 (%):
Scope: population of the Rockford Township, selected other county subdivisions in the Midwest, and entities that contain the Rockford Township
0%10%20%Count#OlatheAurora TownshipAuroraKansas CityWayne TownshipWayneMilwaukeeWichitaLawrence TownshipLawrenceNorth TownshipNSt. PaulDetroitOmahaSouth DakotaThornton TownshipThorntonSioux FallsRockford TownshipRockfordMilton TownshipMiltonBlue TownshipGrand RapidsTopekaWest North CentralPalatine TownshipPalatineProviso TownshipProvisoDowners Grove TownshipDowners GrvToledoOverland ParkMidwestUnited States of AmericaUnited StatesWorth TownshipWorthClevelandCedar RapidsWarrenLincolnColumbusBloomingdale TownshipBloomingdaleCapital TownshipCapitalLisle TownshipLisleWheeling TownshipWheelingYork TownshipBison School District 52-1Bison 52-1Schaumburg TownshipSchaumburgDaytonCincinnatiChicagoAkronCenter TownshipCtrPerkins CountyPerkins968300Tract 968300Maine TownshipMaineWashington TownshipWashingtonSt. LouisSterling HeightsSterling HtsZIP Code 57638ZIP 57638MinneapolisFargoKaw TownshipSpringfield TownshipSpringfieldMadisonAnn Arbor968300-1B.G. 968300-1Rockford TownshipRockford29.310098%29.310098%29.3%38,92038.9k128.976809%28.976809%29.0%42,91942.9k228.278188%28.278188%28.3%42,34842.3k327.826444%27.826444%27.8%39,26239.3k426.475933%26.475933%26.5%158,504159k525.967894%25.967894%26.0%100,764101k625.854317%25.854317%25.9%31,62531.6k725.508555%25.508555%25.5%40,40340.4k825.318684%25.318684%25.3%75,23775.2k925.218343%25.218343%25.2%172,353172k1025.047396%25.047396%25.0%110,978111k1124.629931%24.629931%24.6%209,615210k24.478487%24.478487%24.5%41,48141.5k1224.232733%24.232733%24.2%34,78134.8k1324.130412%24.130412%24.1%42,05442.1k1424.117607%24.117607%24.1%28,56228.6k1524.112045%24.112045%24.1%38,03038.0k1623.914961%23.914961%23.9%46,36846.4k1723.720503%23.720503%23.7%30,23730.2k1823.689691%23.689691%23.7%4,971,0164.97M23.596819%23.596819%23.6%26,85226.9k1923.475670%23.475670%23.5%35,61435.6k2023.327643%23.327643%23.3%34,71234.7k2123.297870%23.297870%23.3%65,43365.4k2223.297511%23.297511%23.3%42,81542.8k2323.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M23.039530%23.039530%23.0%35,21535.2k2422.998471%22.998471%23.0%89,50289.5k2522.994202%22.994202%23.0%29,78629.8k2622.854245%22.854245%22.9%30,86930.9k2722.619388%22.619388%22.6%61,75561.8k2822.597144%22.597144%22.6%185,081185k2922.578243%22.578243%22.6%25,47325.5k3022.459425%22.459425%22.5%26,15426.2k3122.348361%22.348361%22.3%26,63526.6k3222.283587%22.283587%22.3%34,53834.5k3322.227271%22.227271%22.2%27,88327.9k3422.171946%22.171946%22.2%19622.157443%22.157443%22.2%29,26429.3k3522.121536%22.121536%22.1%31,22331.2k3622.113949%22.113949%22.1%65,90265.9k3721.913385%21.913385%21.9%594,733595k3821.641949%21.641949%21.6%42,96143.0k3921.428183%21.428183%21.4%31,52331.5k4021.298443%21.298443%21.3%64321.298443%21.298443%21.3%64320.781276%20.781276%20.8%28,36028.4k4120.516567%20.516567%20.5%27,94527.9k4220.242382%20.242382%20.2%63,97264.0k4320.047997%20.047997%20.0%26,39826.4k4420.020070%20.020070%20.0%39919.962439%19.962439%20.0%80,78280.8k4519.917206%19.917206%19.9%23,09423.1k4618.240862%18.240862%18.2%31,31531.3k4718.124235%18.124235%18.1%29,93029.9k4817.137062%17.137062%17.1%42,16342.2k4913.862661%13.862661%13.9%16,37016.4k5013.848921%13.848921%13.8%7712.500000%12.500000%12.5%3
Count number of children
# rank of county subdivision out of 50 by %

Age Cohorts by County Subdivision in the United States

There are 35,600 county subdivisions in the United States. This section compares the Rockford Township to the 50 most populous county subdivisions in the United States and to those entities that contain or substantially overlap with the Rockford Township. The least populous of the compared county subdivisions has a population of 547,300.

Children by County Subdivision#32

Percentage of population aged 0 to 17 (%):
Scope: population of the Rockford Township, selected other county subdivisions in the United States, and entities that contain the Rockford Township
0%10%20%Count#San BernardinoSouthwest DallasSW DallasNorthwest HarrisNW HarrisFresnoFort WorthSalt Lake CitySalt Lk CityNortheast TarrantNE TarrantHoustonMilwaukeeSan Antonio CentralSan Antonio CntrlEl PasoNortheast DallasNE DallasBronxPlanoTulsaDetroitPhoenixOntarioSouth DakotaTownship 1:Charlotte1, CharlotteAnaheim-Santa Ana-Garden GroveAnaheim-Santa An…SacramentoLong Beach-LakewoodLong Bch-LakewoodLas VegasWest North CentralOceanside-EscondidoOceanside-Escond…BrooklynMidwestUnited States of AmericaUnited StatesAlbuquerqueSan JoseEast San Gabriel ValleyE San Gabriel VlySeattle EastColumbusTown of HempsteadHempsteadOrlandoBison School District 52-1Bison 52-1PhiladelphiaSan DiegoChicagoTampaAustinSan Fernando ValleySan Fernando VlyTucsonPerkins CountyPerkins968300Tract 968300BaltimoreLos AngelesDenverQueensZIP Code 57638ZIP 57638AtlantaMiamiSeattleWashingtonBostonManhattan968300-1B.G. 968300-1San FranciscoRockford TownshipRockford28.994345%28.994345%29.0%243,195243k128.849273%28.849273%28.8%278,686279k228.832103%28.832103%28.8%215,729216k328.397448%28.397448%28.4%196,566197k427.641788%27.641788%27.6%235,492235k527.496527%27.496527%27.5%270,755271k626.987978%26.987978%27.0%154,609155k726.725236%26.725236%26.7%882,854883k826.475933%26.475933%26.5%158,504159k926.202297%26.202297%26.2%183,823184k1026.125729%26.125729%26.1%143,291143k1125.730246%25.730246%25.7%398,059398k1225.573137%25.573137%25.6%367,431367k1325.541202%25.541202%25.5%139,787140k1425.334430%25.334430%25.3%150,050150k1525.218343%25.218343%25.2%172,353172k1624.820142%24.820142%24.8%790,766791k1724.651051%24.651051%24.7%158,701159k1824.629931%24.629931%24.6%209,615210k24.540635%24.540635%24.5%198,493198k1924.485581%24.485581%24.5%415,583416k2024.105398%24.105398%24.1%270,060270k2124.003737%24.003737%24.0%138,756139k2223.974603%23.974603%24.0%448,315448k2323.689691%23.689691%23.7%4,971,0164.97M23.555887%23.555887%23.6%155,230155k2423.337305%23.337305%23.3%608,369608k2523.217458%23.217458%23.2%15,712,75815.7M23.108006%23.108006%23.1%73,612,43873.6M23.033158%23.033158%23.0%147,927148k2622.866327%22.866327%22.9%401,701402k2722.814001%22.814001%22.8%218,249218k2822.721955%22.721955%22.7%133,247133k2922.597144%22.597144%22.6%185,081185k3022.467309%22.467309%22.5%172,708173k3122.237882%22.237882%22.2%129,541130k3222.171946%22.171946%22.2%19622.168125%22.168125%22.2%345,809346k3321.982996%21.982996%22.0%523,203523k3421.913385%21.913385%21.9%594,733595k3521.700117%21.700117%21.7%144,592145k3621.692326%21.692326%21.7%186,313186k3721.633042%21.633042%21.6%398,263398k3821.517750%21.517750%21.5%188,032188k3921.298443%21.298443%21.3%64321.298443%21.298443%21.3%64321.123671%21.123671%21.1%131,178131k4020.884750%20.884750%20.9%537,723538k4120.705017%20.705017%20.7%137,337137k4220.470812%20.470812%20.5%472,878473k4320.020070%20.020070%20.0%39919.876571%19.876571%19.9%115,302115k4419.544858%19.544858%19.5%188,182188k4517.999155%17.999155%18.0%187,875188k4617.402645%17.402645%17.4%114,685115k4716.549062%16.549062%16.5%108,939109k4814.639548%14.639548%14.6%239,355239k4913.848921%13.848921%13.8%7713.481174%13.481174%13.5%114,628115k5012.500000%12.500000%12.5%3
Count number of children
# rank of county subdivision 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:
South Dakota
County:
Perkins
ZIP Code:
57638
Unified School District:
Bison 52-1
Congressional District:
SD-At Large
State Senate District:
SD-28
State House District:
SD-28B
Neighboring Townships:
Barrett, Burdick, Marshfield
Neighboring Unorganized Territories:
Northeast Perkins, Pleasant Valley
Nearby Townships:
Bison, Cash, Clark, Flat Creek, Fredlund, Liberty, Lodgepole, Meadow, Rainbow