Last official estimated population of Winnebago County was 167,004 (year 2014)[1]. This was 0.052% of total US population and 2.9% of total Wisconsin state population. Area of Winnebago County is 578.6 mi² (=1498.5 km²), in this year population density was 288.65 p/mi². If population growth rate would be same as in period 2010-2014 (+0%/yr), Winnebago County population in 2026 would be 167,034 [0].
Historical population of Winnebago County for period 1840-2014 [1] , [2] , [3]:
Estimated population for 2014[1]. Population density is in p./sq.mi [4]. Changes are for period 2010-2015. Value is %/year. Boundary lines are approx. 2012 [5]. Click on flag to hide it.
Population • Density • Changes • Legends • Position

[1840-1850] +54.06 %/yr
[1850-1860] +8.86 %/yr
[1860-1870] +4.6 %/yr
[1870-1880] +1.38 %/yr
[1880-1890] +1.6 %/yr
[1890-1900] +1.51 %/yr
[1900-1910] +0.65 %/yr
[1910-1920] +0.28 %/yr
[1920-1930] +1.83 %/yr
[1930-1940] +0.5 %/yr
[1940-1950] +1.24 %/yr
[1950-1960] +1.71 %/yr
[1960-1970] +1.87 %/yr
[1970-1980] +0.14 %/yr
[1980-1990] +0.64 %/yr
[1990-2000] +1.11 %/yr
[2000-2005] +0.59 %/yr
[2005-2010] +0.68 %/yr
[2010-2014] +0 %/yr
Looking for settlements in Winnebago County? Visit this page: Settlements in Winnebago County, WI
Population of Winnebago County by age groups male (M) and female (F)[1b]
| Age Gr. | (M) | (F) | Total |
| 0 to 4 | 4903 | 4607 | 9,510 |
| 5 to 9 | 5036 | 4802 | 9,838 |
| 10 to 14 | 5075 | 4972 | 10,047 |
| 15 to 19 | 5644 | 5906 | 11,550 |
| 20 to 24 | 7849 | 7683 | 15,532 |
| 25 to 29 | 6005 | 5112 | 11,117 |
| 30 to 34 | 5886 | 5244 | 11,130 |
| 35 to 39 | 5306 | 4648 | 9,954 |
| 40 to 44 | 5355 | 4879 | 10,234 |
| 45 to 49 | 5895 | 5345 | 11,240 |
| 50 to 54 | 6365 | 6201 | 12,566 |
| 55 to 59 | 5921 | 5907 | 11,828 |
| 60 to 64 | 4995 | 4999 | 9,994 |
| 65 to 69 | 3695 | 3979 | 7,674 |
| 70 to 74 | 2634 | 2972 | 5,606 |
| 75 to 79 | 1880 | 2472 | 4,352 |
| 80 to 84 | 1410 | 1950 | 3,360 |
| 85+ | 1336 | 2643 | 3,979 |
Winnebago County resident population estimates by Sex, Race, and Hispanic Origin[1b]. For full list of abbrevations see: population.us/about page.
| Race | Male | Female | Total |
| NH | 81832 | 81132 | 162,964 |
| WAC | 79788 | 80336 | 160,124 |
| WA | 78544 | 79056 | 157,600 |
| NHWAC | 76716 | 77416 | 154,132 |
| NHWA | 75605 | 76261 | 151,866 |
| H | 3358 | 3189 | 6,547 |
| HWAC | 3072 | 2920 | 5,992 |
| HWA | 2939 | 2795 | 5,734 |
| AAC | 2612 | 2709 | 5,321 |
| NHAAC | 2555 | 2647 | 5,202 |
| BAC | 2990 | 1681 | 4,671 |
| AA | 2242 | 2327 | 4,569 |
| NHAA | 2211 | 2287 | 4,498 |
| NHBAC | 2831 | 1522 | 4,353 |
| BA | 2387 | 1039 | 3,426 |
| NHBA | 2281 | 945 | 3,226 |
| TOM | 1301 | 1339 | 2,640 |
| NHTOM | 1164 | 1206 | 2,370 |
| IAC | 1073 | 932 | 2,005 |
| NHIAC | 864 | 750 | 1,614 |
| IA | 675 | 521 | 1,196 |
| NHIA | 536 | 404 | 940 |
| HIAC | 209 | 182 | 391 |
| HBAC | 159 | 159 | 318 |
| HTOM | 137 | 133 | 270 |
| HIA | 139 | 117 | 256 |
| HBA | 106 | 94 | 200 |
| NAC | 92 | 82 | 174 |
| NHNAC | 80 | 66 | 146 |
| HAAC | 57 | 62 | 119 |
| NA | 41 | 39 | 80 |
| HAA | 31 | 40 | 71 |
| NHNA | 35 | 29 | 64 |
| HNAC | 12 | 16 | 28 |
| HNA | 6 | 10 | 16 |
• Brown County population
42.7 mi,
51°
• Outagamie County
25.1 mi,
23°
• Fond du Lac County
24.5 mi,
159°
• Dodge County
45.8 mi,
182°
• Waupaca County
30.9 mi,
331°
• Calumet County
22.6 mi,
91°
• Shawano County
48.8 mi,
354°
• Waushara County
28.4 mi,
273°
• Green Lake County
27.5 mi,
215°
• Marquette County
41 mi,
244°
[0] Calculated by population.us from last known population growth rate, not official data.
[1] County population - 2014, archived from the original, retrieved 02/23/2016
[1b] Annual County Resident Population Estimates by Age, Sex, Race, and Hispanic Origin, (used only data for 2014) archived from the original, retrieved 02/23/2016
[2] County population - 2000-2010, archived from the original, retrieved 02/23/2016
[3] Population of States and Counties of the United States: 1790 to 1992, PDF, 15 Mb, census.gov, retrieved 02/23/2016
[4] County area, latitude longitude data, retrieved 02/23/2016
[5] County boundaries, CSV files on boundaries.us, retrived 03/18/2016
*Brown; see note 4 Wisconsin Notes
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