Data / Rankings / School enrolment, children aged 3 and 4 / Counties in Iowa

Counties in Iowa by school enrolment, children aged 3 and 4

Greene County had the highest school enrolment, children aged 3 and 4 of 99 counties in 2021, at 78.2%. Adams County had the lowest, at 14.6%. The median was 45.8% and the figure for Iowa was 43.5%. Source: the U.S. Census Bureau.

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Highest78.2Greene County
Lowest14.6Adams County
Median45.899 counties
Iowa43.5History

Map of counties, 2021

Adair County: 34.8 %Adams County: 14.6 %Allamakee County: 38 %Appanoose County: 30.7 %Audubon County: 25.6 %Benton County: 49.5 %Black Hawk County: 42.7 %Boone County: 31.6 %Bremer County: 63.1 %Buchanan County: 66.5 %Buena Vista County: 48.9 %Butler County: 49.4 %Calhoun County: 40.8 %Carroll County: 25.3 %Cass County: 73.3 %Cedar County: 27.2 %Cerro Gordo County: 49.4 %Cherokee County: 42.9 %Chickasaw County: 61.7 %Clarke County: 49.7 %Clay County: 62.5 %Clayton County: 34.2 %Clinton County: 40.2 %Crawford County: 38.1 %Dallas County: 46.7 %Davis County: 48.1 %Decatur County: 20.5 %Delaware County: 48.5 %Des Moines County: 44.5 %Dickinson County: 31.4 %Dubuque County: 45.8 %Emmet County: 29.3 %Fayette County: 61.4 %Floyd County: 66.7 %Franklin County: 59.4 %Fremont County: 52.1 %Greene County: 78.2 %Grundy County: 63.8 %Guthrie County: 54.6 %Hamilton County: 52.5 %Hancock County: 28.4 %Hardin County: 30.6 %Harrison County: 59.9 %Henry County: 42.1 %Howard County: 43.1 %Humboldt County: 53.2 %Ida County: 45 %Iowa County: 58.8 %Jackson County: 64.8 %Jasper County: 45.7 %Jefferson County: 26 %Johnson County: 46.8 %Jones County: 54.6 %Keokuk County: 69.8 %Kossuth County: 48.4 %Lee County: 46.6 %Linn County: 47.3 %Louisa County: 36.1 %Lucas County: 64.3 %Lyon County: 21.1 %Madison County: 24.8 %Mahaska County: 50.8 %Marion County: 27.2 %Marshall County: 32.9 %Mills County: 53.4 %Mitchell County: 40 %Monona County: 62.6 %Monroe County: 33 %Montgomery County: 39 %Muscatine County: 53.8 %O'Brien County: 66.1 %Osceola County: 47.6 %Page County: 29.8 %Palo Alto County: 51.4 %Plymouth County: 54.8 %Pocahontas County: 47.5 %Polk County: 37.1 %Pottawattamie County: 32.6 %Poweshiek County: 36.6 %Ringgold County: 62.5 %Sac County: 47.8 %Scott County: 46.8 %Shelby County: 44.7 %Sioux County: 46.5 %Story County: 35.8 %Tama County: 51.6 %Taylor County: 40.3 %Union County: 59.2 %Van Buren County: 42.3 %Wapello County: 39.5 %Warren County: 45.2 %Washington County: 42 %Wayne County: 40.9 %Webster County: 31.5 %Winnebago County: 50.7 %Winneshiek County: 75 %Woodbury County: 38.2 %Worth County: 39.2 %Wright County: 32.9 %
  • Under 32
  • 32 to 40
  • 40 to 46
  • 46 to 50
  • 50 to 60
  • 60 and over
%, 2021. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Greene County: 78.2 %Greene County78.2Winneshiek County: 75 %Winneshiek County75Cass County: 73.3 %Cass County73.3Keokuk County: 69.8 %Keokuk County69.8Floyd County: 66.7 %Floyd County66.7Buchanan County: 66.5 %Buchanan County66.5O'Brien County: 66.1 %O'Brien County66.1Jackson County: 64.8 %Jackson County64.8Lucas County: 64.3 %Lucas County64.3Grundy County: 63.8 %Grundy County63.8Bremer County: 63.1 %Bremer County63.1Monona County: 62.6 %Monona County62.6Ringgold County: 62.5 %Ringgold County62.5Clay County: 62.5 %Clay County62.5Chickasaw County: 61.7 %Chickasaw County61.7Fayette County: 61.4 %Fayette County61.4Harrison County: 59.9 %Harrison County59.9Franklin County: 59.4 %Franklin County59.4Union County: 59.2 %Union County59.2Iowa County: 58.8 %Iowa County58.8Plymouth County: 54.8 %Plymouth County54.8Guthrie County: 54.6 %Guthrie County54.6Jones County: 54.6 %Jones County54.6Muscatine County: 53.8 %Muscatine County53.8Mills County: 53.4 %Mills County53.4Humboldt County: 53.2 %Humboldt County53.2Hamilton County: 52.5 %Hamilton County52.5Fremont County: 52.1 %Fremont County52.1Tama County: 51.6 %Tama County51.6Palo Alto County: 51.4 %Palo Alto County51.4Mahaska County: 50.8 %Mahaska County50.8Winnebago County: 50.7 %Winnebago County50.7Clarke County: 49.7 %Clarke County49.7Benton County: 49.5 %Benton County49.5Cerro Gordo County: 49.4 %Cerro Gordo County49.4Butler County: 49.4 %Butler County49.4Buena Vista County: 48.9 %Buena Vista County48.9Delaware County: 48.5 %Delaware County48.5Kossuth County: 48.4 %Kossuth County48.4Davis County: 48.1 %Davis County48.1Greene County: 78.2 %Greene County78.2Winneshiek County: 75 %Winneshiek County75Cass County: 73.3 %Cass County73.3Keokuk County: 69.8 %Keokuk County69.8Floyd County: 66.7 %Floyd County66.7Buchanan County: 66.5 %Buchanan County66.5O'Brien County: 66.1 %O'Brien County66.1Jackson County: 64.8 %Jackson County64.8Lucas County: 64.3 %Lucas County64.3Grundy County: 63.8 %Grundy County63.8Bremer County: 63.1 %Bremer County63.1Monona County: 62.6 %Monona County62.6Ringgold County: 62.5 %Ringgold County62.5Clay County: 62.5 %Clay County62.5Chickasaw County: 61.7 %Chickasaw County61.7Fayette County: 61.4 %Fayette County61.4Harrison County: 59.9 %Harrison County59.9Franklin County: 59.4 %Franklin County59.4Union County: 59.2 %Union County59.2Iowa County: 58.8 %Iowa County58.8Plymouth County: 54.8 %Plymouth County54.8Guthrie County: 54.6 %Guthrie County54.6Jones County: 54.6 %Jones County54.6Muscatine County: 53.8 %Muscatine County53.8Mills County: 53.4 %Mills County53.4Humboldt County: 53.2 %Humboldt County53.2Hamilton County: 52.5 %Hamilton County52.5Fremont County: 52.1 %Fremont County52.1Tama County: 51.6 %Tama County51.6Palo Alto County: 51.4 %Palo Alto County51.4Mahaska County: 50.8 %Mahaska County50.8Winnebago County: 50.7 %Winnebago County50.7Clarke County: 49.7 %Clarke County49.7Benton County: 49.5 %Benton County49.5Cerro Gordo County: 49.4 %Cerro Gordo County49.4Butler County: 49.4 %Butler County49.4Buena Vista County: 48.9 %Buena Vista County48.9Delaware County: 48.5 %Delaware County48.5Kossuth County: 48.4 %Kossuth County48.4Davis County: 48.1 %Davis County48.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Greene County78.2
2Winneshiek County75
3Cass County73.3
4Keokuk County69.8
5Floyd County66.7
6Buchanan County66.5
7O'Brien County66.1
8Jackson County64.8
9Lucas County64.3
10Grundy County63.8
11Bremer County63.1
12Monona County62.6
13Ringgold County62.5
14Clay County62.5
15Chickasaw County61.7
16Fayette County61.4
17Harrison County59.9
18Franklin County59.4
19Union County59.2
20Iowa County58.8
21Plymouth County54.8
22Guthrie County54.6
22Jones County54.6
24Muscatine County53.8
25Mills County53.4
26Humboldt County53.2
27Hamilton County52.5
28Fremont County52.1
29Tama County51.6
30Palo Alto County51.4
31Mahaska County50.8
32Winnebago County50.7
33Clarke County49.7
34Benton County49.5
35Cerro Gordo County49.4
36Butler County49.4
37Buena Vista County48.9
38Delaware County48.5
39Kossuth County48.4
40Davis County48.1
41Sac County47.8
42Osceola County47.6
43Pocahontas County47.5
44Linn County47.3
45Scott County46.8
46Johnson County46.8
47Dallas County46.7
48Lee County46.6
49Sioux County46.5
50Dubuque County45.8
51Jasper County45.7
52Warren County45.2
53Ida County45
54Shelby County44.7
55Des Moines County44.5
56Howard County43.1
57Cherokee County42.9
58Black Hawk County42.7
59Van Buren County42.3
60Henry County42.1
61Washington County42
62Wayne County40.9
63Calhoun County40.8
64Taylor County40.3
65Clinton County40.2
66Mitchell County40
67Wapello County39.5
68Worth County39.2
69Montgomery County39
70Woodbury County38.2
71Crawford County38.1
72Allamakee County38
73Polk County37.1
74Poweshiek County36.6
75Louisa County36.1
76Story County35.8
77Adair County34.8
78Clayton County34.2
79Monroe County33
80Marshall County32.9
81Wright County32.9
82Pottawattamie County32.6
83Boone County31.6
84Webster County31.5
85Dickinson County31.4
86Appanoose County30.7
87Hardin County30.6
88Page County29.8
89Emmet County29.3
90Hancock County28.4
91Cedar County27.2
92Marion County27.2
93Jefferson County26
94Audubon County25.6
95Carroll County25.3
96Madison County24.8
97Lyon County21.1
98Decatur County20.5
99Adams County14.6

Other periods

About this ranking

Children aged 3 and 4 enrolled in public or private school, including nursery school and preschool, at any time in the three months before the interview, as a percentage of all children aged 3 and 4. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Reported by households, so it includes private nursery schools. Small counties have only a few dozen children in the sample, and their rates can swing widely between periods.

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. American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat. 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). American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs (Counties in Iowa by school enrolment, children aged 3 and 4, 2021) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat

MLA 9

American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs, Counties in Iowa by school enrolment, children aged 3 and 4, 2021. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat. Invokely, https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. Counties in Iowa by school enrolment, children aged 3 and 4, 2021. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat. Also distributed by Invokely, https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs, Counties in Iowa by school enrolment, children aged 3 and 4, 2021 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat, via Invokely: https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs: Counties in Iowa by school enrolment, children aged 3 and 4, 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs: Counties in Iowa by school enrolment, children aged 3 and 4, 2021
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat
L2  - https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/preschool-enrollment-ages-3-4/iowa-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b14003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Iowa by school enrolment, children aged 3 and 4 using official data, and cite the source.
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Questions

Which county has the highest school enrolment, children aged 3 and 4?

Greene County, with 78.2% in 2021, according to the U.S. Census Bureau.

Which county has the lowest school enrolment, children aged 3 and 4?

Adams County, with 14.6% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B14003: children aged 3 and 4 enrolled in public or private school as a percentage of all children aged 3 and 4, calculated with stored inputs. Retrieved 2026-10-12.

School enrolment, children aged 3 and 4: other rankings

Counties in Iowa: more rankings