Age and Sex in Winnebago County, Illinois (County)

Age Structure#1

Percentage in each age cohort per year of age.1 Gray areas represent percentile bands from the counties in Illinois.
Scope: population of Illinois, Winnebago County, and other counties in Illinois
Winnebago County
Illinois
Percentile:
0th - 100th
10th - 90th
20th - 80th
30th - 70th
40th - 60th
0.0% 0.5% 1.0% Count % 85+ 80-84 75-79 70-74 67-69 65-66 62-64 60-61 55-59 50-54 45-49 40-44 35-39 30-34 25-29 22-24 21 20 18-19 15-17 10-14 5-9 0-4 6,169 2.103% 2.10% 6,029 2.055% 2.05% 7,188 2.450% 2.45% 9,271 3.160% 3.16% 7,589 2.587% 2.59% 5,713 1.947% 1.95% 10,438 10.4k 3.558% 3.56% 6,760 2.304% 2.30% 19,888 19.9k 6.779% 6.78% 21,818 21.8k 7.437% 7.44% 21,157 21.2k 7.211% 7.21% 19,938 19.9k 6.796% 6.80% 17,750 17.8k 6.050% 6.05% 18,072 18.1k 6.160% 6.16% 18,277 18.3k 6.230% 6.23% 10,281 10.3k 3.504% 3.50% 3,446 1.175% 1.17% 4,123 1.405% 1.41% 7,277 2.480% 2.48% 12,558 12.6k 4.280% 4.28% 20,621 20.6k 7.029% 7.03% 19,802 19.8k 6.750% 6.75% 19,219 19.2k 6.551% 6.55%

Detailed Age and Sex#2

Percentage in each age cohort per year of age.1
Scope: population of Illinois and Winnebago County
Female Male
Illinois
Winnebago County
Shaded bar tips show excess over facing bar.
0.5% 0.0% 0.5% Count % 85+ 80-84 75-79 70-74 67-69 65-66 62-64 60-61 55-59 50-54 45-49 40-44 35-39 30-34 25-29 22-24 21 20 18-19 15-17 10-14 5-9 0-4 -0.045014% -0.041392% -0.036529% -0.044520% -0.086406% 0.09% 0.045014% 0.036529% 0.045014% 0.05% 6,169 2.103% 2.10% -0.155769% -0.099460% -0.144170% -0.073892% -0.255229% 0.26% 0.155769% 0.144170% 0.155769% 0.16% 6,029 2.055% 2.05% -0.212759% -0.064489% -0.194283% -0.065799% -0.277248% 0.28% 0.212759% 0.194283% 0.212759% 0.21% 7,188 2.450% 2.45% -0.301789% -0.028427% -0.266028% -0.060914% -0.330216% 0.33% 0.301789% 0.266028% 0.301789% 0.30% 9,271 3.160% 3.16% -0.395841% -0.070556% -0.342337% -0.047821% -0.466397% 0.47% 0.395841% 0.342337% 0.395841% 0.40% 7,589 2.587% 2.59% -0.452138% -0.069363% -0.415156% -0.054041% -0.521501% 0.52% 0.452138% 0.415156% 0.452138% 0.45% 5,713 1.947% 1.95% -0.572628% -0.040675% -0.494510% -0.038105% -0.613303% 0.61% 0.572628% 0.494510% 0.572628% 0.57% 10,438 10.4k 3.558% 3.56% -0.561380% -0.561962% -0.041939% -0.561380% 0.56% 0.561380% 0.029313% 0.561962% 0.590693% 0.59% 6,760 2.304% 2.30% -0.645298% -0.065171% -0.621370% -0.042484% -0.710468% 0.71% 0.645298% 0.621370% 0.645298% 0.65% 19,888 19.9k 6.779% 6.78% -0.740395% -0.006544% -0.710259% -0.027844% -0.746939% 0.75% 0.740395% 0.710259% 0.740395% 0.74% 21,818 21.8k 7.437% 7.44% -0.715717% -0.010839% -0.701483% -0.016679% -0.726556% 0.73% 0.715717% 0.701483% 0.715717% 0.72% 21,157 21.2k 7.211% 7.21% -0.668407% -0.022360% -0.672628% -0.009673% -0.690767% 0.69% 0.668407% 0.672628% 0.668407% 0.67% 19,938 19.9k 6.796% 6.80% -0.600714% -0.653635% -0.001289% -0.600714% 0.60% 0.600714% 0.008589% 0.653635% 0.609304% 0.61% 17,750 17.8k 6.050% 6.05% -0.600783% -0.030404% -0.682397% -0.631186% 0.63% 0.600783% 0.682397% 0.001546% 0.600783% 0.60% 18,072 18.1k 6.160% 6.16% -0.610122% -0.025700% -0.696763% -0.635822% 0.64% 0.610122% 0.696763% 0.007959% 0.610122% 0.61% 18,277 18.3k 6.230% 6.23% -0.557858% -0.052377% -0.660910% -0.610236% 0.61% 0.557858% 0.660910% 0.022773% 0.557858% 0.56% 10,281 10.3k 3.504% 3.50% -0.578423% -0.017724% -0.710749% -0.596147% 0.60% 0.578423% 0.710749% 0.014562% 0.578423% 0.58% 3,446 1.175% 1.17% -0.640798% -0.696763% -0.640798% 0.64% 0.640798% 0.123729% 0.696763% 0.045476% 0.764527% 0.76% 4,123 1.405% 1.41% -0.599385% -0.685198% -0.599385% 0.60% 0.599385% 0.041413% 0.685198% 0.048881% 0.640798% 0.64% 7,277 2.480% 2.48% -0.706810% -0.685649% -0.706810% 0.71% 0.706810% 0.013180% 0.685649% 0.034951% 0.719989% 0.72% 12,558 12.6k 4.280% 4.28% -0.669293% -0.660681% -0.669293% 0.67% 0.669293% 0.067147% 0.660681% 0.035702% 0.736441% 0.74% 20,621 20.6k 7.029% 7.03% -0.664249% -0.021405% -0.653379% -0.685654% 0.69% 0.664249% 0.653379% 0.019120% 0.664249% 0.66% 19,802 19.8k 6.750% 6.75% -0.639912% -0.625641% -0.639912% 0.64% 0.639912% 0.030336% 0.625641% 0.026327% 0.670248% 0.67% 19,219 19.2k 6.551% 6.55%

Age and Sex#3

Percentage in each age cohort per year of age.1
Scope: population of Illinois and Winnebago County
Female Male
Illinois
Winnebago County
Shaded bar tips show excess over facing bar.
0.5% 0.0% 0.5% Count % Senior 2 Older Adult 3 Younger Adult 4 College 5 Children 6 -0.171211% -0.054848% -0.151783% -0.054636% -0.226059% 0.23% 0.171211% 0.151783% 0.171211% 0.17% 41,959 42.0k 14.302% 14.3% -0.669934% -0.023519% -0.645446% -0.027264% -0.693453% 0.69% 0.669934% 0.645446% 0.669934% 0.67% 99,999 100.0k 34.085% 34.1% -0.598590% -0.021928% -0.675175% -0.620518% 0.62% 0.598590% 0.675175% 0.006078% 0.598590% 0.60% 64,380 64.4k 21.944% 21.9% -0.608929% -0.694477% -0.608929% 0.61% 0.608929% 0.047208% 0.694477% 0.039450% 0.656137% 0.66% 14,846 14.8k 5.060% 5.06% -0.671929% -0.653081% -0.671929% 0.67% 0.671929% 0.023329% 0.653081% 0.028366% 0.695259% 0.70% 72,200 72.2k 24.609% 24.6%

Sex Ratio#4

Percentage more males or females in selected age cohorts.
Scope: population of Illinois and Winnebago County
More Females More Males
Illinois
Winnebago County
100% 50% 0% M:F F M 85+ 80-84 75-79 70-74 67-69 65-66 62-64 60-61 55-59 50-54 45-49 40-44 35-39 30-34 25-29 22-24 21 20 18-19 15-17 10-14 5-9 0-4 -91.954567% -121.873335% -91.954567% 92.0% 0.521 0.52 65.748% 65.7% 34.252% 34.3% -63.851204% -51.252983% -63.851204% 63.9% 0.610 0.61 62.100% 62.1% 37.900% 37.9% -30.310798% -33.867466% -30.310798% 30.3% 0.767 0.77 56.580% 56.6% 43.420% 43.4% -9.419471% -22.897650% -9.419471% 9.4% 0.914 0.91 52.249% 52.2% 47.751% 47.8% -17.824340% -13.969050% -17.824340% 17.8% 0.849 0.85 54.091% 54.1% 45.909% 45.9% -15.341123% -13.017069% -15.341123% 15.3% 0.867 0.87 53.562% 53.6% 46.438% 46.4% -7.103175% -7.705706% -7.103175% 7.1% 0.934 0.93 51.715% 51.7% 48.285% 48.3% -7.462883% 5.221615% 5.221615% 5.2% 1.052 1.05 48.728% 48.7% 51.272% 51.3% -10.099303% -6.837181% -10.099303% 10.1% 0.908 0.91 52.403% 52.4% 47.597% 47.6% -0.883897% -3.920314% -0.883897% 0.9% 0.991 0.99 50.220% 50.2% 49.780% 49.8% -1.514430% -2.377666% -1.514430% 1.5% 0.985 0.99 50.376% 50.4% 49.624% 49.6% -3.345232% -1.438043% -3.345232% 3.3% 0.968 0.97 50.823% 50.8% 49.177% 49.2% -0.197184% 1.429868% 1.429868% 1.4% 1.014 1.01 49.645% 49.6% 50.355% 50.4% -5.060706% -5.060706% 5.1% 0.226510% 0.952 0.95 51.234% 51.2% 48.766% 48.8% -4.212291% -4.212291% 4.2% 1.142264% 0.960 0.96 51.031% 51.0% 48.969% 49.0% -9.389002% -9.389002% 9.4% 3.445704% 0.914 0.91 52.242% 52.2% 47.758% 47.8% -3.064231% -3.064231% 3.1% 2.048817% 0.970 0.97 50.754% 50.8% 49.246% 49.2% 19.308511% 6.526741% 19.308511% 19.3% 1.193 1.19 45.598% 45.6% 54.402% 54.4% 6.909298% 7.133851% 6.909298% 6.9% 1.069 1.07 48.330% 48.3% 51.670% 51.7% 1.864652% 5.097469% 1.864652% 1.9% 1.019 1.02 49.538% 49.5% 50.462% 50.5% 10.032593% 5.403826% 10.032593% 10.0% 1.100 1.10 47.612% 47.6% 52.388% 52.4% -3.222496% -3.222496% 3.2% 2.926273% 0.969 0.97 50.793% 50.8% 49.207% 49.2% 4.740599% 4.207957% 4.740599% 4.7% 1.047 1.05 48.842% 48.8% 51.158% 51.2%

Map of Age Cohorts by County Subdivision in Winnebago County

Children Age Cohorts by County Subdivision#5

Percentage of population aged 0 to 17 (%):
10.6%14.4%18.1%21.8%25.6%29.4%

College Age Cohorts by County Subdivision#6

Percentage of population aged 18 to 21 (%):
0.9%2.5%4.0%5.5%7.0%8.5%

20s Age Cohorts by County Subdivision#7

Percentage of population aged 22 to 29 (%):
3.3%5.6%7.8%10.1%12.3%14.6%

30s Age Cohorts by County Subdivision#8

Percentage of population aged 30 to 39 (%):
3.9%6.9%9.8%12.8%15.7%18.7%

40s Age Cohorts by County Subdivision#9

Percentage of population aged 40 to 49 (%):
4.6%7.6%10.6%13.6%16.6%19.7%

50s Age Cohorts by County Subdivision#10

Percentage of population aged 50 to 59 (%):
7.3%11.2%15.1%18.9%22.8%26.7%

60s Age Cohorts by County Subdivision#11

Percentage of population aged 60 to 69 (%):
7%16%25%33%41%50%

70s Age Cohorts by County Subdivision#12

Percentage of population aged 70 to 79 (%):
1.1%2.8%4.4%6.1%7.7%9.4%

80+ Age Cohorts by County Subdivision#13

Percentage of population aged 80 and older (%):
0.0%1.7%3.4%5.1%6.8%8.6%
Road Data © OpenStreetMap

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Map of Age Cohorts by Tract in Winnebago County

Children Age Cohorts by Tract#14

Percentage of population aged 0 to 17 (%):
4%12%20%28%36%45%

College Age Cohorts by Tract#15

Percentage of population aged 18 to 21 (%):
0.6%2.7%4.8%6.8%8.9%11.0%

20s Age Cohorts by Tract#16

Percentage of population aged 22 to 29 (%):
3.5%6.4%9.2%12.0%14.8%17.6%

30s Age Cohorts by Tract#17

Percentage of population aged 30 to 39 (%):
3.3%6.6%9.9%13.3%16.6%20.0%

40s Age Cohorts by Tract#18

Percentage of population aged 40 to 49 (%):
5.9%9.4%12.8%16.3%19.7%23.2%

50s Age Cohorts by Tract#19

Percentage of population aged 50 to 59 (%):
4.6%9.2%13.7%18.2%22.7%27.2%

60s Age Cohorts by Tract#20

Percentage of population aged 60 to 69 (%):
2.6%6.2%9.7%13.3%16.8%20.4%

70s Age Cohorts by Tract#21

Percentage of population aged 70 to 79 (%):
0.3%2.7%5.0%7.3%9.7%12.0%

80+ Age Cohorts by Tract#22

Percentage of population aged 80 and older (%):
0%5%11%16%21%27%
Road Data © OpenStreetMap

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Map of Age Cohorts by Block Group in Winnebago County

Children Age Cohorts by Block Group#23

Percentage of population aged 0 to 17 (%):
0%12%24%35%47%59%

College Age Cohorts by Block Group#24

Percentage of population aged 18 to 21 (%):
0.0%4.1%8.1%12.2%16.2%20.3%

20s Age Cohorts by Block Group#25

Percentage of population aged 22 to 29 (%):
0%6%11%17%22%28%

30s Age Cohorts by Block Group#26

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

40s Age Cohorts by Block Group#27

Percentage of population aged 40 to 49 (%):
1%9%16%23%30%38%

50s Age Cohorts by Block Group#28

Percentage of population aged 50 to 59 (%):
0%9%18%27%36%45%

60s Age Cohorts by Block Group#29

Percentage of population aged 60 to 69 (%):
0%6%12%18%24%30%

70s Age Cohorts by Block Group#30

Percentage of population aged 70 to 79 (%):
0.0%4.6%9.1%13.7%18.3%22.9%

80+ Age Cohorts by Block Group#31

Percentage of population aged 80 and older (%):
0%9%17%26%34%43%
Road Data © OpenStreetMap

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Age Cohorts by Place in Winnebago County

There are 12 places that are fully or partially contained within Winnebago County (8 fully and 4 partially). This section compares all 12 of those to each other, Winnebago County, and other entities that contain or substantially overlap with Winnebago County.

Children by Place#32

Percentage of population aged 0 to 17 (%):
Scope: population of Winnebago County, selected places in Winnebago County, and entities that contain Winnebago County
0% 10% 20% 30% Count # Roscoe Pecatonica South Beloit Winnebago New Milford Rockton Rockford Rockford Metro Area Rockford Area Winnebago County Winnebago Illinois Midwest Machesney Park Machesney Pk United States of America United States East North Central Loves Park Durand Lake Summerset Lk Summerset Cherry Valley 30.564235% 30.564235% 30.6% 3,326 1 29.943747% 29.943747% 29.9% 692 2 29.358361% 29.358361% 29.4% 2,393 3 28.058430% 28.058430% 28.1% 922 4 26.728723% 26.728723% 26.7% 201 5 26.383838% 26.383838% 26.4% 1,959 6 26.255768% 26.255768% 26.3% 39,945 39.9k 7 25.147646% 25.147646% 25.1% 87,376 87.4k 24.609386% 24.609386% 24.6% 72,200 72.2k 24.021505% 24.021505% 24.0% 3,086,416 3.09M 23.782699% 23.782699% 23.8% 15,969,644 16.0M 23.763144% 23.763144% 23.8% 5,514 8 23.713901% 23.713901% 23.7% 73,877,478 73.9M 23.670662% 23.670662% 23.7% 11,008,271 11.0M 23.365878% 23.365878% 23.4% 5,648 9 21.173672% 21.173672% 21.2% 267 10 19.386574% 19.386574% 19.4% 335 11 14.261632% 14.261632% 14.3% 423 12

Age Cohorts by County Subdivision in Winnebago County

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

Children by County Subdivision#41

Percentage of population aged 0 to 17 (%):
Scope: population of Winnebago County, selected county subdivisions in Winnebago County, and entities that contain Winnebago County
0% 10% 20% Count # Pecatonica Township Pecatonica Burritt Township Burritt Rockton Township Rockton Roscoe Township Roscoe Winnebago Township Winnebago Rockford Metro Area Rockford Area Rockford Township Rockford Winnebago County Winnebago Illinois Midwest United States of America United States Owen Township East North Central Durand Township Durand Harlem Township Harlem Cherry Valley Township Cherry Vly Seward Township Seward Harrison Township Harrison Shirland Township Shirland Laona Township Laona 29.303944% 29.303944% 29.3% 1,263 1 29.029304% 29.029304% 29.0% 317 2 26.765480% 26.765480% 26.8% 4,370 3 26.527899% 26.527899% 26.5% 5,187 4 25.807678% 25.807678% 25.8% 1,358 5 25.147646% 25.147646% 25.1% 87,376 87.4k 24.800834% 24.800834% 24.8% 43,988 44.0k 6 24.609386% 24.609386% 24.6% 72,200 72.2k 24.021505% 24.021505% 24.0% 3,086,416 3.09M 23.782699% 23.782699% 23.8% 15,969,644 16.0M 23.713901% 23.713901% 23.7% 73,877,478 73.9M 23.711340% 23.711340% 23.7% 897 7 23.670662% 23.670662% 23.7% 11,008,271 11.0M 23.370429% 23.370429% 23.4% 588 8 22.917397% 22.917397% 22.9% 9,150 9 22.667816% 22.667816% 22.7% 4,471 10 22.125813% 22.125813% 22.1% 204 11 21.327684% 21.327684% 21.3% 151 12 16.235781% 16.235781% 16.2% 157 13 10.656620% 10.656620% 10.7% 99 14

Age Cohorts by County in the Rockford Area

There are 2 counties in the Rockford Area. This section compares Winnebago County to all of the counties in the Rockford Area and to those entities that contain or substantially overlap with Winnebago County.

Children by County#50

Percentage of population aged 0 to 17 (%):
Scope: population of Winnebago County, selected other counties in the Rockford Area, and entities that contain Winnebago County
0% 5% 10% 15% 20% 25% Count # Boone County Boone Rockford Metro Area Rockford Area Winnebago County Winnebago Illinois Midwest United States of America United States East North Central 28.068358% 28.068358% 28.1% 15,176 15.2k 1 25.147646% 25.147646% 25.1% 87,376 87.4k 24.609386% 24.609386% 24.6% 72,200 72.2k 2 24.021505% 24.021505% 24.0% 3,086,416 3.09M 23.782699% 23.782699% 23.8% 15,969,644 16.0M 23.713901% 23.713901% 23.7% 73,877,478 73.9M 23.670662% 23.670662% 23.7% 11,008,271 11.0M

Age Cohorts by County in Illinois

There are 102 counties in Illinois. This section compares Winnebago County to the 50 most populous counties in Illinois and to those entities that contain or substantially overlap with Winnebago County. The least populous of the compared counties has a population of 29,878.

Children by County#59

Percentage of population aged 0 to 17 (%):
Scope: population of Winnebago County, selected other counties in Illinois, and entities that contain Winnebago County