Age and Sex in North Polk Community School District, Iowa (Unified School District)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the unified school districts in Iowa.
Scope: population of Iowa, North Polk Community School District, and other unified school districts in Iowa
North Polk
Iowa
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0.0%0.5%1.0%1.5%2.0%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4891.236%1.24%660.917%0.92%981.361%1.36%1542.139%2.14%1452.014%2.01%1742.417%2.42%2693.736%3.74%2773.847%3.85%5888.167%8.17%5237.264%7.26%6038.375%8.38%4506.250%6.25%5327.389%7.39%3835.319%5.32%2593.597%3.60%2463.417%3.42%190.264%0.26%580.806%0.81%1742.417%2.42%2713.764%3.76%74710.375%10.4%6358.819%8.82%4406.111%6.11%
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 North Polk Community School District
Female Male
Iowa
North Polk
Shaded bar tips show excess over facing bar.
0.5%0.0%0.5%Count%Senior2Older Adult3Younger Adult4College5Children6-0.135031%-0.010031%-0.192490%-0.053856%-0.145062%0.15%0.135031%0.192490%0.135031%0.14%72610.083%10.1%-0.740556%-0.024444%-0.638182%-0.765000%0.77%0.740556%0.638182%0.001353%0.740556%0.74%2,71037.639%37.6%-0.510031%-0.075617%-0.619125%-0.585648%0.59%0.510031%0.619125%0.025145%0.510031%0.51%1,42019.722%19.7%-0.375000%-0.735381%-0.375000%0.38%0.375000%0.121528%0.735381%0.054111%0.496528%0.50%2513.486%3.49%-0.745370%-0.634612%-0.745370%0.75%0.745370%0.124228%0.634612%0.031800%0.869599%0.87%2,09329.069%29.1%
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 North Polk Community School District
Female Male
Iowa
North Polk
Shaded bar tips show excess over facing bar.
1.0%0.5%0.0%0.5%1.0%Count%85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-0.004340%-0.068576%-0.051411%-0.053545%-0.072917%0.07%0.004340%0.051411%0.004340%0.00%891.236%1.24%-0.063889%-0.174468%-0.075066%-0.063889%0.06%0.063889%0.055556%0.174468%0.119444%0.12%660.917%0.92%-0.111111%-0.248144%-0.065989%-0.111111%0.11%0.111111%0.050000%0.248144%0.161111%0.16%981.361%1.36%-0.188889%-0.050000%-0.334521%-0.038389%-0.238889%0.24%0.188889%0.334521%0.188889%0.19%1542.139%2.14%-0.268519%-0.424367%-0.036879%-0.268519%0.27%0.268519%0.134259%0.424367%0.402778%0.40%1452.014%2.01%-0.590278%-0.524144%-0.037115%-0.590278%0.59%0.590278%0.027778%0.524144%0.618056%0.62%1742.417%2.42%-0.546296%-0.595229%-0.000536%-0.546296%0.55%0.546296%0.152778%0.595229%0.699074%0.70%2693.736%3.74%-0.743056%-0.437500%-0.663219%-0.010462%-1.180556%1.18%0.743056%0.663219%0.743056%0.74%2773.847%3.85%-0.738889%-0.155556%-0.675983%-0.012541%-0.894444%0.89%0.738889%0.675983%0.738889%0.74%5888.167%8.17%-0.550000%-0.690906%-0.006245%-0.550000%0.55%0.550000%0.352778%0.690906%0.902778%0.90%5237.264%7.26%-0.708333%-0.258333%-0.607007%-0.966667%0.97%0.708333%0.607007%0.012683%0.708333%0.71%6038.375%8.38%-0.613889%-0.571295%-0.613889%0.61%0.613889%0.022222%0.571295%0.017376%0.636111%0.64%4506.250%6.25%-0.683333%-0.111111%-0.587487%-0.794444%0.79%0.683333%0.587487%0.012483%0.683333%0.68%5327.389%7.39%-0.483333%-0.628104%-0.483333%0.48%0.483333%0.097222%0.628104%0.026170%0.580556%0.58%3835.319%5.32%-0.355556%-0.601386%-0.355556%0.36%0.355556%0.008333%0.601386%0.033864%0.363889%0.36%2593.597%3.60%-0.347222%-0.444444%-0.686455%-0.791667%0.79%0.347222%0.686455%0.030011%0.347222%0.35%2463.417%3.42%-0.027778%-0.208333%-0.733441%-0.236111%0.24%0.027778%0.733441%0.046900%0.027778%0.03%190.264%0.26%-0.069444%-0.770169%-0.069444%0.07%0.069444%0.666667%0.770169%0.056074%0.736111%0.74%580.806%0.81%-0.597222%-0.718956%-0.597222%0.60%0.597222%0.013889%0.718956%0.056734%0.611111%0.61%1742.417%2.42%-0.574074%-0.640338%-0.574074%0.57%0.574074%0.106481%0.640338%0.030076%0.680556%0.68%2713.764%3.76%-0.922222%-0.639003%-0.922222%0.92%0.922222%0.230556%0.639003%0.033033%1.152778%1.15%74710.375%10.4%-0.836111%-0.643465%-0.836111%0.84%0.836111%0.091667%0.643465%0.031842%0.927778%0.93%6358.819%8.82%-0.580556%-0.617932%-0.580556%0.58%0.580556%0.061111%0.617932%0.031559%0.641667%0.64%4406.111%6.11%
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 North Polk Community School District
More Females More Males
Iowa
North Polk
1,000%500%0%500%M:FFM85+80-8475-7970-7467-6965-6662-6460-6155-5950-5445-4940-4435-3930-3425-2922-24212018-1915-1710-145-90-4-1,000.000000%-104.151992%-1,000.000000%> 1000%0.0600.0694.382%94.4%5.618%5.62%-43.025830%86.956522%86.956522%87.0%1.8701.8734.848%34.8%65.152%65.2%-26.592985%45.000000%45.000000%45.0%1.4501.4540.816%40.8%59.184%59.2%-26.470588%-11.475915%-26.470588%26.5%0.7910.7955.844%55.8%44.156%44.2%-8.690265%50.000000%50.000000%50.0%1.5001.5040.000%40.0%60.000%60.0%-7.081005%4.705882%4.705882%4.7%1.0471.0548.851%48.9%51.149%51.1%-0.090132%27.966102%27.966102%28.0%1.2801.2843.866%43.9%56.134%56.1%-58.878505%-1.577402%-58.878505%58.9%0.6290.6361.372%61.4%38.628%38.6%-21.052632%-1.855238%-21.052632%21.1%0.8260.8354.762%54.8%45.238%45.2%-0.903856%64.141414%64.141414%64.1%1.6411.6437.859%37.9%62.141%62.1%-36.470588%-36.470588%36.5%2.089388%0.7330.7357.711%57.7%42.289%42.3%3.619910%3.041504%3.619910%3.6%1.0361.0449.111%49.1%50.889%50.9%-16.260163%-16.260163%16.3%2.124838%0.8600.8653.759%53.8%46.241%46.2%20.114943%4.166539%20.114943%20.1%1.2011.2045.431%45.4%54.569%54.6%2.343750%5.630908%2.343750%2.3%1.0231.0249.421%49.4%50.579%50.6%-128.000000%-128.000000%128.0%4.371952%0.4390.4469.512%69.5%30.488%30.5%-750.000000%-750.000000%750.0%6.394558%0.1180.1289.474%89.5%10.526%10.5%960.000000%7.280782%960.000000%960.0%10.60010.68.621%8.62%91.379%91.4%2.325581%7.891202%2.325581%2.3%1.0231.0249.425%49.4%50.575%50.6%18.548387%4.696873%18.548387%18.5%1.1851.1945.756%45.8%54.244%54.2%25.000000%5.169461%25.000000%25.0%1.2501.2544.444%44.4%55.556%55.6%10.963455%4.948524%10.963455%11.0%1.1101.1147.402%47.4%52.598%52.6%10.526316%5.107154%10.526316%10.5%1.1051.1147.500%47.5%52.500%52.5%
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 North Polk Community School District

Children Age Cohorts by County Subdivision#5

Percentage of population aged 0 to 17 (%):
0%6%13%19%25%32%

College Age Cohorts by County Subdivision#6

Percentage of population aged 18 to 21 (%):
0.0%2.3%4.6%7.0%9.3%11.7%

20s Age Cohorts by County Subdivision#7

Percentage of population aged 22 to 29 (%):
0.0%2.6%5.2%7.8%10.4%13.0%

30s Age Cohorts by County Subdivision#8

Percentage of population aged 30 to 39 (%):
7.0%9.2%11.4%13.6%15.8%18.0%

40s Age Cohorts by County Subdivision#9

Percentage of population aged 40 to 49 (%):
11.1%14.3%17.4%20.6%23.7%26.9%

50s Age Cohorts by County Subdivision#10

Percentage of population aged 50 to 59 (%):
0.0%4.5%9.0%13.6%18.1%22.7%

60s Age Cohorts by County Subdivision#11

Percentage of population aged 60 to 69 (%):
6%12%17%23%28%34%

70s Age Cohorts by County Subdivision#12

Percentage of population aged 70 to 79 (%):
2%9%15%21%27%34%

80+ Age Cohorts by County Subdivision#13

Percentage of population aged 80 and older (%):
0.0%1.1%2.2%3.3%4.4%5.6%
Road Data ©OpenStreetMap

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Map of Age Cohorts by Tract in North Polk Community School District

Children Age Cohorts by Tract#14

Percentage of population aged 0 to 17 (%):
22.4%24.2%26.0%27.7%29.5%31.3%

College Age Cohorts by Tract#15

Percentage of population aged 18 to 21 (%):
3.32%3.73%4.13%4.54%4.94%5.35%

20s Age Cohorts by Tract#16

Percentage of population aged 22 to 29 (%):
5.7%6.9%8.1%9.3%10.5%11.7%

30s Age Cohorts by Tract#17

Percentage of population aged 30 to 39 (%):
9.6%11.0%12.5%13.9%15.3%16.8%

40s Age Cohorts by Tract#18

Percentage of population aged 40 to 49 (%):
12.7%13.7%14.7%15.7%16.6%17.6%

50s Age Cohorts by Tract#19

Percentage of population aged 50 to 59 (%):
11.6%12.8%13.9%15.0%16.1%17.3%

60s Age Cohorts by Tract#20

Percentage of population aged 60 to 69 (%):
6.5%7.9%9.4%10.8%12.2%13.7%

70s Age Cohorts by Tract#21

Percentage of population aged 70 to 79 (%):
2.4%3.3%4.1%5.0%5.8%6.7%

80+ Age Cohorts by Tract#22

Percentage of population aged 80 and older (%):
0.7%2.0%3.3%4.5%5.8%7.1%
Road Data ©OpenStreetMap

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Map of Age Cohorts by Block Group in North Polk Community School District

Children Age Cohorts by Block Group#23

Percentage of population aged 0 to 17 (%):
13.9%17.8%21.6%25.5%29.3%33.2%

College Age Cohorts by Block Group#24

Percentage of population aged 18 to 21 (%):
1.3%2.0%2.7%3.3%4.0%4.7%

20s Age Cohorts by Block Group#25

Percentage of population aged 22 to 29 (%):
2.4%4.4%6.4%8.3%10.3%12.3%

30s Age Cohorts by Block Group#26

Percentage of population aged 30 to 39 (%):
1.1%4.4%7.5%10.7%13.9%17.1%

40s Age Cohorts by Block Group#27

Percentage of population aged 40 to 49 (%):
11.1%12.5%13.8%15.1%16.5%17.8%

50s Age Cohorts by Block Group#28

Percentage of population aged 50 to 59 (%):
9.7%13.6%17.4%21.1%24.9%28.8%

60s Age Cohorts by Block Group#29

Percentage of population aged 60 to 69 (%):
7.1%8.5%9.9%11.2%12.6%14.0%

70s Age Cohorts by Block Group#30

Percentage of population aged 70 to 79 (%):
1.8%3.9%5.9%7.9%10.0%12.1%

80+ Age Cohorts by Block Group#31

Percentage of population aged 80 and older (%):
0.0%1.6%3.2%4.8%6.5%8.1%
Road Data ©OpenStreetMap

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Age Cohorts by Place in North Polk Community School District

There are 5 places that are fully or partially contained within North Polk Community School District (3 fully and 2 partially). This section compares all 5 of those to each other, North Polk Community School District, and other entities that contain or substantially overlap with North Polk Community School District.

Children by Place#32

Percentage of population aged 0 to 17 (%):
Scope: population of North Polk Community School District, selected places in North Polk Community School District, and entities that contain North Polk Community School District
0%10%20%30%Count#Polk CityNorth Polk Community School DistrictNorth PolkAnkenyElkhartAllemanWest North CentralIowaMidwestUnited States of AmericaUnited StatesSheldahl30.886999%30.886999%30.9%1,271129.069444%29.069444%29.1%2,09327.824687%27.824687%27.8%14,86214.9k224.539877%24.539877%24.5%200323.847695%23.847695%23.8%119423.689691%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%73,612,43873.6M18.875502%18.875502%18.9%475
Count number of children
# rank of place out of 5 by %

Age Cohorts by County Subdivision in North Polk Community School District

There are 9 county subdivisions that are fully or partially contained within North Polk Community School District (0 fully and 9 partially). This section compares all 9 of those to each other, North Polk Community School District, and other entities that contain or substantially overlap with North Polk Community School District.

Children by County Subdivision#41

Percentage of population aged 0 to 17 (%):
Scope: population of North Polk Community School District, selected county subdivisions in North Polk Community School District, and entities that contain North Polk Community School District
0%10%20%30%Count#Madison TownshipMadisonPalestine TownshipPalestineLincoln TownshipLincolnNorth Polk Community School DistrictNorth PolkCrocker TownshipCrockerDouglas TownshipDouglasElkhart TownshipElkhartUnion TownshipUnionWest North CentralIowaMidwestUnited States of AmericaUnited StatesGarden TownshipGdnSaylorville Reservoir31.262376%31.262376%31.3%1,263129.658488%29.658488%29.7%1,789229.653882%29.653882%29.7%317329.069444%29.069444%29.1%2,09328.859738%28.859738%28.9%15,44415.4k427.008547%27.008547%27.0%1,896524.844720%24.844720%24.8%400623.956443%23.956443%24.0%132723.689691%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%73,612,43873.6M16.909295%16.909295%16.9%15180.000000%0.000000%0.0%09
Count number of children
# rank of county subdivision out of 9 by %

Age Cohorts by Unified School District in Iowa

There are 336 unified school districts in Iowa. This section compares North Polk Community School District to the 50 most populous unified school districts in Iowa and to those entities that contain or substantially overlap with North Polk Community School District. The least populous of the compared unified school districts has a population of 11,628.

Children by Unified School District#50

Percentage of population aged 0 to 17 (%):
Scope: population of North Polk Community School District, selected other unified school districts in Iowa, and entities that contain North Polk Community School District
0%10%20%30%Count#Dallas Center-Grimes Community School DistrictDallas Ctr-GrimesWaukee Community School DistrictWaukeeNorth Polk Community School DistrictNorth PolkAnkeny Community School DistrictAnkenyLinn-Mar Community School DistrictLinn-MarNorwalk Community School DistrictNorwalkJohnston Community School DistrictJohnstonWestern Dubuque Community School DistrictW DubuqueStorm Lake Community School DistrictStorm LakeCollege Community School DistrictCollegeMarshalltown Community School DistrictMarshalltownSioux City Community School DistrictSioux CityPleasant Valley Community School DistrictPleasant VlySoutheast Polk Community School DistrictSE PolkNorth Scott Community School DistrictNorth ScottLewis Central Community School DistrictLewis CentralPella Community School DistrictPellaBettendorf Community School DistrictBettendorfMuscatine Community School DistrictMuscatineDes Moines Independent Community School DistrictDes Moines Indep…Urbandale Community School DistrictUrbandaleSpencer Community School DistrictSpencerWest North CentralCarroll Community School DistrictCarrollLe Mars Community School DistrictLe MarsDavenport Community School DistrictDavenportIowaKeokuk Community School DistrictKeokukIndianola Community School DistrictIndianolaMidwestBurlington Community School DistrictBurlingtonUnited States of AmericaUnited StatesWaterloo Community School DistrictWaterlooOttumwa Community School DistrictOttumwaOskaloosa Community School DistrictOskaloosaCouncil Bluffs Community School DistrictCouncil BluffsMarion Independent School DistrictMarionCedar Rapids Community School DistrictCedar RapidsDubuque Community School DistrictDubuqueWest Des Moines Community School DistrictW Des MoinesBoone Community School DistrictBooneClinton Community School DistrictClintonWaverly-Shell Rock Community School DistrictWaverly-Shell RockMason City Community School DistrictMason CityNewton Community School DistrictNewtonMount Pleasant Community School DistrictMt PleasantFort Dodge Community School DistrictFort DodgeClear Creek-Amana Community School DistrictClear Crk-AmanaFort Madison Community School DistrictFort MadisonGrinnell-Newburg Community School DistrictGrinnell-NewburgIowa City Community School DistrictIowa CityFairfield Community School DistrictFairfieldCedar Falls Community School DistrictCedar FallsDecorah Community School DistrictDecorahAmes Community School DistrictAmes32.279078%32.279078%32.3%3,766129.854491%29.854491%29.9%14,28014.3k229.069444%29.069444%29.1%2,09328.261349%28.261349%28.3%16,66616.7k327.667747%27.667747%27.7%10,58910.6k427.430071%27.430071%27.4%3,344527.219203%27.219203%27.2%9,616626.553463%26.553463%26.6%5,739726.173448%26.173448%26.2%3,184826.090699%26.090699%26.1%6,668925.912908%25.912908%25.9%7,9621025.723934%25.723934%25.7%21,32921.3k1125.685832%25.685832%25.7%5,4681225.375320%25.375320%25.4%9,0091325.172500%25.172500%25.2%4,0131424.934734%24.934734%24.9%4,1071524.880445%24.880445%24.9%3,8501624.681934%24.681934%24.7%5,7231724.530965%24.530965%24.5%7,1261824.451975%24.451975%24.5%51,59051.6k1923.706464%23.706464%23.7%4,9622023.693434%23.693434%23.7%3,0422123.689691%23.689691%23.7%4,971,0164.97M23.645320%23.645320%23.6%3,2642223.640433%23.640433%23.6%3,1692323.492871%23.492871%23.5%25,86825.9k2423.418418%23.418418%23.4%727,514728k23.296670%23.296670%23.3%3,0502523.246959%23.246959%23.2%4,7012623.217458%23.217458%23.2%15,712,75815.7M23.202126%23.202126%23.2%6,9852723.108006%23.108006%23.1%73,612,43873.6M23.045305%23.045305%23.0%17,77317.8k2822.905918%22.905918%22.9%6,6152922.852894%22.852894%22.9%3,6883022.542969%22.542969%22.5%13,26013.3k3122.388060%22.388060%22.4%2,7453222.377977%22.377977%22.4%27,36227.4k3322.311728%22.311728%22.3%17,39417.4k3421.890042%21.890042%21.9%14,00714.0k3521.637100%21.637100%21.6%3,0983621.316155%21.316155%21.3%5,3773721.065580%21.065580%21.1%2,9973821.044531%21.044531%21.0%6,0163920.936122%20.936122%20.9%4,4644020.847137%20.847137%20.8%2,6434120.758281%20.758281%20.8%5,9354220.739860%20.739860%20.7%2,7924320.272288%20.272288%20.3%3,3954420.118392%20.118392%20.1%2,4474519.261154%19.261154%19.3%21,99222.0k4619.072962%19.072962%19.1%3,0824718.206547%18.206547%18.2%7,8314815.342277%15.342277%15.3%1,7844911.651879%11.651879%11.7%7,14450
Count number of children
# rank of unified school district 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
Counties:
Boone, Polk, Story
Metro Areas:
Ames Area, Boone Area, Des Moines Area
Cities:
Alleman, Ankeny, Elkhart, Polk City, Sheldahl
Townships:
Crocker, Douglas, Elkhart, Garden, Lincoln, Madison, Palestine, Union
Unorganized Territories:
Saylorville Reservoir
ZIP Codes:
50007, 50021, 50023, 50035, 50046, 50073, 50109, 50124, 50156, 50161, 50226, 50243, 50244
Congressional Districts:
IA-3, IA-4
State Senate Districts:
IA-10, IA-15, IA-19, IA-20, IA-24
State House Districts:
IA-19, IA-30, IA-37, IA-38, IA-39, IA-48
Neighboring Unified School Districts:
Ankeny, Ballard, Bondurant-Farrar, Collins-Maxwell, Johnston, Madrid, Woodward-Granger
Nearby Unified School Districts:
Ames, Colfax-Mingo, Dallas Center-Grimes, Des Moines Independent, Nevada, Saydel, Southeast Polk, United, Urbandale, West Des Moines