Data / Rankings / Net international migration, July to June / Counties in Iowa

Counties in Iowa by net international migration, July to June

Polk County had the highest net international migration, July to June of 99 counties in 2015, at 975. Boone County had the lowest, at -5. The median was 9 and the figure for Iowa was 5,701. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest975Polk County
Lowest-5Boone County
Median999 counties
Iowa5,701History

Map of counties, 2015

Adair County: 3 personsAdams County: 0 personsAllamakee County: 31 personsAppanoose County: 4 personsAudubon County: 1 personsBenton County: 9 personsBlack Hawk County: 337 personsBoone County: -5 personsBremer County: 32 personsBuchanan County: 9 personsBuena Vista County: 95 personsButler County: 8 personsCalhoun County: 5 personsCarroll County: 6 personsCass County: 2 personsCedar County: 5 personsCerro Gordo County: 26 personsCherokee County: 5 personsChickasaw County: 13 personsClarke County: 11 personsClay County: 9 personsClayton County: 8 personsClinton County: 46 personsCrawford County: 83 personsDallas County: 255 personsDavis County: 0 personsDecatur County: 12 personsDelaware County: 9 personsDes Moines County: 28 personsDickinson County: 6 personsDubuque County: 96 personsEmmet County: 8 personsFayette County: 23 personsFloyd County: 20 personsFranklin County: 6 personsFremont County: 3 personsGreene County: 1 personsGrundy County: 0 personsGuthrie County: 5 personsHamilton County: 9 personsHancock County: 4 personsHardin County: 10 personsHarrison County: 0 personsHenry County: 21 personsHoward County: 0 personsHumboldt County: 9 personsIda County: 8 personsIowa County: -2 personsJackson County: 1 personsJasper County: 9 personsJefferson County: 222 personsJohnson County: 852 personsJones County: 18 personsKeokuk County: 6 personsKossuth County: 8 personsLee County: 1 personsLinn County: 375 personsLouisa County: 45 personsLucas County: 0 personsLyon County: 1 personsMadison County: 8 personsMahaska County: 33 personsMarion County: 7 personsMarshall County: 111 personsMills County: 7 personsMitchell County: 1 personsMonona County: -1 personsMonroe County: 2 personsMontgomery County: 3 personsMuscatine County: 102 personsO'Brien County: 6 personsOsceola County: 8 personsPage County: 12 personsPalo Alto County: 21 personsPlymouth County: 30 personsPocahontas County: 5 personsPolk County: 975 personsPottawattamie County: 45 personsPoweshiek County: 36 personsRinggold County: 4 personsSac County: 0 personsScott County: 271 personsShelby County: 0 personsSioux County: 64 personsStory County: 722 personsTama County: 12 personsTaylor County: 7 personsUnion County: 7 personsVan Buren County: 0 personsWapello County: 101 personsWarren County: 10 personsWashington County: 13 personsWayne County: -1 personsWebster County: 71 personsWinnebago County: 9 personsWinneshiek County: 12 personsWoodbury County: 161 personsWorth County: 1 personsWright County: 14 persons
  • Under -2
  • -2 to -1
  • -1 to 0
  • 0 to 6
  • 6 to 17
  • 17 and over
persons, 2015. Red areas are below zero and blue areas above it. Source: U.S. Census Bureau, Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2015

Polk County: 975 personsPolk County975Johnson County: 852 personsJohnson County852Story County: 722 personsStory County722Linn County: 375 personsLinn County375Black Hawk County: 337 personsBlack Hawk County337Scott County: 271 personsScott County271Dallas County: 255 personsDallas County255Jefferson County: 222 personsJefferson County222Woodbury County: 161 personsWoodbury County161Marshall County: 111 personsMarshall County111Muscatine County: 102 personsMuscatine County102Wapello County: 101 personsWapello County101Dubuque County: 96 personsDubuque County96Buena Vista County: 95 personsBuena Vista County95Crawford County: 83 personsCrawford County83Webster County: 71 personsWebster County71Sioux County: 64 personsSioux County64Clinton County: 46 personsClinton County46Louisa County: 45 personsLouisa County45Pottawattamie County: 45 personsPottawattamie County45Poweshiek County: 36 personsPoweshiek County36Mahaska County: 33 personsMahaska County33Bremer County: 32 personsBremer County32Allamakee County: 31 personsAllamakee County31Plymouth County: 30 personsPlymouth County30Des Moines County: 28 personsDes Moines County28Cerro Gordo County: 26 personsCerro Gordo County26Fayette County: 23 personsFayette County23Henry County: 21 personsHenry County21Palo Alto County: 21 personsPalo Alto County21Floyd County: 20 personsFloyd County20Jones County: 18 personsJones County18Wright County: 14 personsWright County14Chickasaw County: 13 personsChickasaw County13Washington County: 13 personsWashington County13Decatur County: 12 personsDecatur County12Page County: 12 personsPage County12Tama County: 12 personsTama County12Winneshiek County: 12 personsWinneshiek County12Clarke County: 11 personsClarke County11Polk County: 975 personsPolk County975Johnson County: 852 personsJohnson County852Story County: 722 personsStory County722Linn County: 375 personsLinn County375Black Hawk County: 337 personsBlack Hawk County337Scott County: 271 personsScott County271Dallas County: 255 personsDallas County255Jefferson County: 222 personsJefferson County222Woodbury County: 161 personsWoodbury County161Marshall County: 111 personsMarshall County111Muscatine County: 102 personsMuscatine County102Wapello County: 101 personsWapello County101Dubuque County: 96 personsDubuque County96Buena Vista County: 95 personsBuena Vista County95Crawford County: 83 personsCrawford County83Webster County: 71 personsWebster County71Sioux County: 64 personsSioux County64Clinton County: 46 personsClinton County46Louisa County: 45 personsLouisa County45Pottawattamie County: 45 personsPottawattamie County45Poweshiek County: 36 personsPoweshiek County36Mahaska County: 33 personsMahaska County33Bremer County: 32 personsBremer County32Allamakee County: 31 personsAllamakee County31Plymouth County: 30 personsPlymouth County30Des Moines County: 28 personsDes Moines County28Cerro Gordo County: 26 personsCerro Gordo County26Fayette County: 23 personsFayette County23Henry County: 21 personsHenry County21Palo Alto County: 21 personsPalo Alto County21Floyd County: 20 personsFloyd County20Jones County: 18 personsJones County18Wright County: 14 personsWright County14Chickasaw County: 13 personsChickasaw County13Washington County: 13 personsWashington County13Decatur County: 12 personsDecatur County12Page County: 12 personsPage County12Tama County: 12 personsTama County12Winneshiek County: 12 personsWinneshiek County12Clarke County: 11 personsClarke County11
persons. Source: U.S. Census Bureau, Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Full ranking

RankCounties2015
persons		Change on 2014
1Polk County Estimated975-28.8%
2Johnson County Estimated852-23.9%
3Story County Estimated722-25.3%
4Linn County Estimated375-8.1%
5Black Hawk County Estimated337-22.9%
6Scott County Estimated271-17.9%
7Dallas County Estimated255-20.1%
8Jefferson County Estimated222-27.7%
9Woodbury County Estimated161-22.2%
10Marshall County Estimated111+7.8%
11Muscatine County Estimated102+7.4%
12Wapello County Estimated101-16.5%
13Dubuque County Estimated96-8.6%
14Buena Vista County Estimated95+10.5%
15Crawford County Estimated83+159.4%
16Webster County Estimated71+26.8%
17Sioux County Estimated64-22%
18Clinton County Estimated46+15%
19Louisa County Estimated45-19.6%
19Pottawattamie County Estimated45-43.8%
21Poweshiek County Estimated36-23.4%
22Mahaska County Estimated33-13.2%
23Bremer County Estimated32-15.8%
24Allamakee County Estimated31+40.9%
25Plymouth County Estimated30-25%
26Des Moines County Estimated28-12.5%
27Cerro Gordo County Estimated26-21.2%
28Fayette County Estimated23-25.8%
29Henry County Estimated21-19.2%
29Palo Alto County Estimated21+5%
31Floyd County Estimated20+2,100%
32Jones County Estimated18-53.8%
33Wright County Estimated14-12.5%
34Chickasaw County Estimated13+44.4%
34Washington County Estimated13-35%
36Decatur County Estimated12+33.3%
36Page County Estimated12-25%
36Tama County Estimated12+200%
36Winneshiek County Estimated12+100%
40Clarke County Estimated11+266.7%
41Hardin County Estimated10-28.6%
41Warren County Estimated10-9.1%
43Benton County Estimated9+80%
43Buchanan County Estimated9+28.6%
43Clay County Estimated9+80%
43Delaware County Estimated9-40%
43Hamilton County Estimated9-55%
43Humboldt County Estimated9+50%
43Jasper County Estimated9+1,000%
43Winnebago County Estimated9+350%
51Butler County Estimated8-42.9%
51Clayton County Estimated8-11.1%
51Emmet County Estimated8+100%
51Ida County Estimated8+300%
51Kossuth County Estimated80%
51Madison County Estimated8-52.9%
51Osceola County Estimated80%
58Marion County Estimated7-61.1%
58Mills County Estimated7+450%
58Taylor County Estimated7-56.3%
58Union County Estimated7-53.3%
62Carroll County Estimated6+20%
62Dickinson County Estimated6-45.5%
62Franklin County Estimated6-45.5%
62Keokuk County Estimated6+20%
62O'Brien County Estimated6-33.3%
67Calhoun County Estimated50%
67Cedar County Estimated5-64.3%
67Cherokee County Estimated5-50%
67Guthrie County Estimated5-28.6%
67Pocahontas County Estimated5+150%
72Appanoose County Estimated4-42.9%
72Hancock County Estimated4-33.3%
72Ringgold County Estimated4+100%
75Adair County Estimated3n/a
75Fremont County Estimated3+50%
75Montgomery County Estimated3-50%
78Cass County Estimated2n/a
78Monroe County Estimated2-60%
80Audubon County Estimated10%
80Greene County Estimated1n/a
80Jackson County Estimated1-66.7%
80Lee County Estimated1-75%
80Lyon County Estimated10%
80Mitchell County Estimated1-75%
80Worth County Estimated1-50%
87Adams County Estimated0n/a
87Davis County Estimated0n/a
87Grundy County Estimated0n/a
87Harrison County Estimated0n/a
87Howard County Estimated0+100%
87Lucas County Estimated0n/a
87Sac County Estimated0n/a
87Shelby County Estimated0-100%
87Van Buren County Estimated0n/a
96Monona County Estimated-1-133.3%
96Wayne County Estimated-1n/a
98Iowa County Estimated-2n/a
99Boone County Estimated-5-25%

Other periods

About this ranking

Estimated moves into the area from abroad minus moves out of the area to other countries, from July 1 of the previous year through June 30 of the reported year.

More on how it is measured
  • United States: Census Bureau estimates, including people born in the United States and abroad, moves between the states and Puerto Rico, and net movement of the Armed Forces overseas.
  • Canada: Statistics Canada immigrants, minus net emigration, plus the net change in non-permanent residents.
  • Australia: ABS net overseas migration for the financial year.
  • United Kingdom local authorities: Office for National Statistics mid-year estimates, counting people who move for at least 12 months.

A component of each country's official population estimates. Methods differ between the statistical offices, so compare places within a country first. Differs from the World Bank net_migration series, which uses calendar years and a different method.

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: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. 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: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021 (Counties in Iowa by net international migration, July to June, 2015) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Iowa by net international migration, July to June, 2015. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/net-international-migration-july-june/iowa-counties?period=2015. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Counties in Iowa by net international migration, July to June, 2015. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/net-international-migration-july-june/iowa-counties?period=2015.

Harvard

U.S. Census Bureau (2026) Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021, Counties in Iowa by net international migration, July to June, 2015 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/net-international-migration-july-june/iowa-counties?period=2015 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_iowa_by_2015,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Iowa by net international migration, July to June, 2015}},
  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/net-international-migration-july-june/iowa-counties?period=2015. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. 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: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021: Counties in Iowa by net international migration, July to June, 2015
PY  - 2026
DA  - 2026/03/26
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/net-international-migration-july-june/iowa-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-july-june/iowa-counties?period=2015.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Rank Counties in Iowa by net international migration, July to June using official data, and cite the source.
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Questions

Which county has the highest net international migration, July to June?

Polk County, with 975 in 2015, according to the U.S. Census Bureau.

Which county has the lowest net international migration, July to June?

Boone County, with -5 in 2015.

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: net international migration, July 1 of the previous year to June 30 of the reported year; vintage 2020 files for 2011 to 2020 and the latest 2020s vintage from 2021. Retrieved 2026-10-12.

Net international migration, July to June: other rankings

Counties in Iowa: more rankings