Data / Rankings / Female population share / Counties in Iowa

Counties in Iowa by female population share

Monona County had the highest female population share of 99 counties in 2020, at 51.6%. Page County had the lowest, at 47%. The median was 50.2% and the figure for Iowa was 50.3%. Source: the U.S. Census Bureau.

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Highest51.6Monona County
Lowest47Page County
Median50.299 counties
Iowa50.3History

Map of counties, 2020

Adair County: 50.3 %Adams County: 50.4 %Allamakee County: 49.2 %Appanoose County: 50.7 %Audubon County: 50.4 %Benton County: 49.6 %Black Hawk County: 51.1 %Boone County: 49.9 %Bremer County: 50.6 %Buchanan County: 50.4 %Buena Vista County: 49.3 %Butler County: 50.3 %Calhoun County: 47.6 %Carroll County: 50.5 %Cass County: 51.1 %Cedar County: 50.3 %Cerro Gordo County: 51.1 %Cherokee County: 50 %Chickasaw County: 49.6 %Clarke County: 49.6 %Clay County: 50.6 %Clayton County: 49.4 %Clinton County: 50.9 %Crawford County: 49.5 %Dallas County: 50.8 %Davis County: 50.3 %Decatur County: 49.7 %Delaware County: 49.7 %Des Moines County: 51 %Dickinson County: 50.6 %Dubuque County: 50.3 %Emmet County: 49.5 %Fayette County: 49.3 %Floyd County: 50.3 %Franklin County: 49.5 %Fremont County: 49.5 %Greene County: 50.7 %Grundy County: 50.9 %Guthrie County: 50.2 %Hamilton County: 49.4 %Hancock County: 49.8 %Hardin County: 50 %Harrison County: 49.6 %Henry County: 48.2 %Howard County: 48.9 %Humboldt County: 50.8 %Ida County: 49.8 %Iowa County: 50.1 %Jackson County: 49.9 %Jasper County: 48.4 %Jefferson County: 48.9 %Johnson County: 50.5 %Jones County: 47.2 %Keokuk County: 49.5 %Kossuth County: 49.3 %Lee County: 49.9 %Linn County: 50.9 %Louisa County: 49.1 %Lucas County: 49.9 %Lyon County: 49.1 %Madison County: 50.2 %Mahaska County: 50.2 %Marion County: 50.3 %Marshall County: 49.4 %Mills County: 50.1 %Mitchell County: 50.2 %Monona County: 51.6 %Monroe County: 50.2 %Montgomery County: 50.9 %Muscatine County: 50.2 %O'Brien County: 49.6 %Osceola County: 49.5 %Page County: 47 %Palo Alto County: 50 %Plymouth County: 49.9 %Pocahontas County: 49.9 %Polk County: 50.8 %Pottawattamie County: 50.4 %Poweshiek County: 51.3 %Ringgold County: 50.8 %Sac County: 50.4 %Scott County: 50.9 %Shelby County: 50.2 %Sioux County: 49.6 %Story County: 47.9 %Tama County: 50.4 %Taylor County: 49.6 %Union County: 50.7 %Van Buren County: 48.6 %Wapello County: 50 %Warren County: 50.7 %Washington County: 50.8 %Wayne County: 50.8 %Webster County: 48.2 %Winnebago County: 50.2 %Winneshiek County: 50.3 %Woodbury County: 50.2 %Worth County: 49.3 %Wright County: 50.2 %
  • Under 49
  • 49 to 50
  • 50 to 51
  • 51 and over
%, 2020. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2020

Monona County: 51.6 %Monona County51.6Poweshiek County: 51.3 %Poweshiek County51.3Cass County: 51.1 %Cass County51.1Cerro Gordo County: 51.1 %Cerro Gordo County51.1Black Hawk County: 51.1 %Black Hawk County51.1Des Moines County: 51 %Des Moines County51Montgomery County: 50.9 %Montgomery County50.9Linn County: 50.9 %Linn County50.9Clinton County: 50.9 %Clinton County50.9Scott County: 50.9 %Scott County50.9Grundy County: 50.9 %Grundy County50.9Washington County: 50.8 %Washington County50.8Ringgold County: 50.8 %Ringgold County50.8Polk County: 50.8 %Polk County50.8Dallas County: 50.8 %Dallas County50.8Humboldt County: 50.8 %Humboldt County50.8Wayne County: 50.8 %Wayne County50.8Greene County: 50.7 %Greene County50.7Union County: 50.7 %Union County50.7Warren County: 50.7 %Warren County50.7Appanoose County: 50.7 %Appanoose County50.7Clay County: 50.6 %Clay County50.6Dickinson County: 50.6 %Dickinson County50.6Bremer County: 50.6 %Bremer County50.6Johnson County: 50.5 %Johnson County50.5Carroll County: 50.5 %Carroll County50.5Pottawattamie County: 50.4 %Pottawattamie County50.4Buchanan County: 50.4 %Buchanan County50.4Audubon County: 50.4 %Audubon County50.4Adams County: 50.4 %Adams County50.4Sac County: 50.4 %Sac County50.4Tama County: 50.4 %Tama County50.4Dubuque County: 50.3 %Dubuque County50.3Cedar County: 50.3 %Cedar County50.3Butler County: 50.3 %Butler County50.3Floyd County: 50.3 %Floyd County50.3Winneshiek County: 50.3 %Winneshiek County50.3Adair County: 50.3 %Adair County50.3Davis County: 50.3 %Davis County50.3Marion County: 50.3 %Marion County50.3Monona County: 51.6 %Monona County51.6Poweshiek County: 51.3 %Poweshiek County51.3Cass County: 51.1 %Cass County51.1Cerro Gordo County: 51.1 %Cerro Gordo County51.1Black Hawk County: 51.1 %Black Hawk County51.1Des Moines County: 51 %Des Moines County51Montgomery County: 50.9 %Montgomery County50.9Linn County: 50.9 %Linn County50.9Clinton County: 50.9 %Clinton County50.9Scott County: 50.9 %Scott County50.9Grundy County: 50.9 %Grundy County50.9Washington County: 50.8 %Washington County50.8Ringgold County: 50.8 %Ringgold County50.8Polk County: 50.8 %Polk County50.8Dallas County: 50.8 %Dallas County50.8Humboldt County: 50.8 %Humboldt County50.8Wayne County: 50.8 %Wayne County50.8Greene County: 50.7 %Greene County50.7Union County: 50.7 %Union County50.7Warren County: 50.7 %Warren County50.7Appanoose County: 50.7 %Appanoose County50.7Clay County: 50.6 %Clay County50.6Dickinson County: 50.6 %Dickinson County50.6Bremer County: 50.6 %Bremer County50.6Johnson County: 50.5 %Johnson County50.5Carroll County: 50.5 %Carroll County50.5Pottawattamie County: 50.4 %Pottawattamie County50.4Buchanan County: 50.4 %Buchanan County50.4Audubon County: 50.4 %Audubon County50.4Adams County: 50.4 %Adams County50.4Sac County: 50.4 %Sac County50.4Tama County: 50.4 %Tama County50.4Dubuque County: 50.3 %Dubuque County50.3Cedar County: 50.3 %Cedar County50.3Butler County: 50.3 %Butler County50.3Floyd County: 50.3 %Floyd County50.3Winneshiek County: 50.3 %Winneshiek County50.3Adair County: 50.3 %Adair County50.3Davis County: 50.3 %Davis County50.3Marion County: 50.3 %Marion County50.3
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2020 (%)Change on 2019
1Monona County51.6-0.1 pts
2Poweshiek County51.3-0.1 pts
3Cass County51.1-0.1 pts
4Cerro Gordo County51.1-0 pts
5Black Hawk County51.10 pts
6Des Moines County51-0.1 pts
7Montgomery County50.9-0.4 pts
8Linn County50.9+0.1 pts
9Clinton County50.90 pts
10Scott County50.9-0.1 pts
11Grundy County50.9-0 pts
12Washington County50.8-0 pts
13Ringgold County50.80 pts
14Polk County50.8-0.1 pts
15Dallas County50.8-0.1 pts
16Humboldt County50.8+0.4 pts
17Wayne County50.8-0.2 pts
18Greene County50.7-0.4 pts
19Union County50.7+0.2 pts
20Warren County50.7-0.1 pts
21Appanoose County50.7+0.2 pts
22Clay County50.6-0.3 pts
23Dickinson County50.6-0.1 pts
24Bremer County50.6-0.1 pts
25Johnson County50.50 pts
26Carroll County50.5-0.2 pts
27Pottawattamie County50.4-0 pts
28Buchanan County50.4+0.1 pts
29Audubon County50.4+0.1 pts
30Adams County50.4-0.6 pts
31Sac County50.4-0.1 pts
32Tama County50.40 pts
33Dubuque County50.3-0.1 pts
34Cedar County50.3-0 pts
35Butler County50.3+0.1 pts
35Floyd County50.3-0.3 pts
37Winneshiek County50.3-0.1 pts
38Adair County50.3-0.1 pts
39Davis County50.3-0.5 pts
40Marion County50.3-0.1 pts
41Guthrie County50.2-0 pts
42Monroe County50.20 pts
43Muscatine County50.20 pts
44Shelby County50.2+0.1 pts
45Winnebago County50.20 pts
46Wright County50.20 pts
47Mahaska County50.2+0.1 pts
48Woodbury County50.2-0 pts
49Mitchell County50.2-0.1 pts
50Madison County50.2-0.1 pts
51Mills County50.1+0.2 pts
52Iowa County50.1-0.2 pts
53Wapello County50-0.2 pts
54Hardin County50+0.1 pts
55Cherokee County500 pts
56Palo Alto County50-0.1 pts
57Jackson County49.9-0 pts
58Lee County49.9+0.1 pts
59Plymouth County49.9-0.1 pts
60Pocahontas County49.9-0 pts
61Boone County49.9+0.1 pts
62Lucas County49.9+0.2 pts
63Hancock County49.80 pts
64Ida County49.8-0.6 pts
65Decatur County49.7-0.2 pts
66Delaware County49.7+0.2 pts
67Sioux County49.60 pts
68Chickasaw County49.6-0.3 pts
69Harrison County49.6+0.1 pts
70Taylor County49.60 pts
71Benton County49.6-0.1 pts
72Clarke County49.6-0.2 pts
73O'Brien County49.6-0.1 pts
74Crawford County49.5-0.1 pts
75Osceola County49.5+0.4 pts
76Franklin County49.5+0.1 pts
77Emmet County49.50 pts
78Fremont County49.5-0.3 pts
78Keokuk County49.5-0.2 pts
80Marshall County49.40 pts
81Clayton County49.4+0.2 pts
82Hamilton County49.4-0.3 pts
83Kossuth County49.3-0.1 pts
84Worth County49.3+0.2 pts
85Buena Vista County49.3-0.2 pts
86Fayette County49.3-0.1 pts
87Allamakee County49.2+0.1 pts
88Lyon County49.1-0.1 pts
89Louisa County49.1-0.1 pts
90Jefferson County48.9+0.2 pts
91Howard County48.9-0.4 pts
92Van Buren County48.6+0.4 pts
93Jasper County48.40 pts
94Webster County48.2-0.1 pts
95Henry County48.2+0.2 pts
96Story County47.90 pts
97Calhoun County47.6-0.2 pts
98Jones County47.2-0.2 pts
99Page County47+0.2 pts

Other periods

About this ranking

Female residents as a percentage of total population on 1 July. United States: Census Bureau county population estimates by sex; states and the nation are sums of their counties.

Counties with large prisons or military bases can have low shares.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in Iowa by female population share, 2020) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Iowa by female population share, 2020. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in Iowa by female population share, 2020. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in Iowa by female population share, 2020 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_by_2020,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Iowa by female population share, 2020}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in Iowa by female population share, 2020
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/female-population-share/iowa-counties?period=2020.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest female population share?

Monona County, with 51.6% in 2020, according to the U.S. Census Bureau.

Which county has the lowest female population share?

Page County, with 47% in 2020.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: female residents as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Female population share: other rankings

Counties in Iowa: more rankings