Counties in Iowa by net domestic migration, July to June
Dallas County had the highest net domestic migration, July to June of 99 counties in 2020, at 2,387. Black Hawk County had the lowest, at -895. The median was -78 and the figure for Iowa was -7,799. Source: the U.S. Census Bureau.
Top 40 counties, 2020
Full ranking
| Rank | Counties | 2020 | Change on 2019 |
|---|---|---|---|
| 1 | Dallas County Estimated | 2,387 | -10.2% |
| 2 | Warren County Estimated | 598 | +81.8% |
| 3 | Dickinson County Estimated | 278 | +85.3% |
| 4 | Madison County Estimated | 228 | +145.2% |
| 5 | Monroe County Estimated | 81 | +222.7% |
| 6 | Mitchell County Estimated | 80 | +122.2% |
| 7 | Bremer County Estimated | 69 | -5.5% |
| 8 | Buchanan County Estimated | 66 | +177.6% |
| 9 | Jefferson County Estimated | 60 | +161.2% |
| 10 | Montgomery County Estimated | 54 | +871.4% |
| 11 | Ida County Estimated | 50 | +28.2% |
| 12 | Iowa County Estimated | 43 | +38.7% |
| 13 | Howard County Estimated | 36 | +340% |
| 14 | Osceola County Estimated | 31 | +147% |
| 15 | Cass County Estimated | 30 | +133% |
| 16 | Monona County Estimated | 29 | +26.1% |
| 17 | Van Buren County Estimated | 27 | -44.9% |
| 18 | Guthrie County Estimated | 22 | -43.6% |
| 19 | Cherokee County Estimated | 6 | +137.5% |
| 20 | Audubon County Estimated | 4 | -88.6% |
| 20 | Wayne County Estimated | 4 | -81.8% |
| 22 | Jones County Estimated | 3 | +127.3% |
| 23 | Grundy County Estimated | 2 | +108% |
| 24 | Page County Estimated | -3 | +96.3% |
| 25 | Adams County Estimated | -12 | +67.6% |
| 25 | Pocahontas County Estimated | -12 | +82.1% |
| 27 | Boone County Estimated | -13 | -18.2% |
| 28 | Humboldt County Estimated | -17 | +66% |
| 29 | Palo Alto County Estimated | -23 | +20.7% |
| 30 | Lee County Estimated | -29 | +85.7% |
| 31 | Davis County Estimated | -32 | +15.8% |
| 31 | Plymouth County Estimated | -32 | -124.1% |
| 33 | Jasper County Estimated | -34 | -780% |
| 34 | Allamakee County Estimated | -35 | +82.9% |
| 34 | Shelby County Estimated | -35 | +55.1% |
| 36 | Cedar County Estimated | -36 | -228.6% |
| 37 | Butler County Estimated | -38 | +51.3% |
| 38 | Story County Estimated | -41 | +88.5% |
| 39 | Adair County Estimated | -46 | -180.7% |
| 40 | Poweshiek County Estimated | -47 | -251.6% |
| 41 | Lucas County Estimated | -48 | -23.1% |
| 42 | Ringgold County Estimated | -49 | -32.4% |
| 43 | Winnebago County Estimated | -56 | +66.9% |
| 44 | Sac County Estimated | -59 | -837.5% |
| 45 | Union County Estimated | -61 | +24.7% |
| 46 | Worth County Estimated | -62 | -195.2% |
| 47 | Greene County Estimated | -67 | +9.5% |
| 48 | Appanoose County Estimated | -71 | -182.6% |
| 49 | Harrison County Estimated | -72 | -157.1% |
| 50 | Clarke County Estimated | -78 | +53% |
| 51 | Hamilton County Estimated | -87 | +13% |
| 52 | Kossuth County Estimated | -89 | +4.3% |
| 53 | Marion County Estimated | -92 | -1,214.3% |
| 54 | Louisa County Estimated | -93 | +42.9% |
| 55 | Webster County Estimated | -94 | +78.6% |
| 56 | O'Brien County Estimated | -98 | -1,500% |
| 57 | Decatur County Estimated | -99 | -30.3% |
| 58 | Mahaska County Estimated | -101 | -173.7% |
| 59 | Keokuk County Estimated | -105 | -425% |
| 60 | Taylor County Estimated | -106 | -278.6% |
| 61 | Calhoun County Estimated | -110 | -115.7% |
| 62 | Franklin County Estimated | -111 | -1,010% |
| 63 | Clay County Estimated | -123 | -38.2% |
| 64 | Delaware County Estimated | -124 | -44.2% |
| 64 | Lyon County Estimated | -124 | -13.8% |
| 66 | Washington County Estimated | -126 | +19.2% |
| 67 | Emmet County Estimated | -129 | -158% |
| 68 | Winneshiek County Estimated | -130 | -94% |
| 69 | Marshall County Estimated | -135 | +77.7% |
| 70 | Chickasaw County Estimated | -138 | -176% |
| 71 | Jackson County Estimated | -140 | |
| 71 | Wright County Estimated | -140 | -2.2% |
| 73 | Henry County Estimated | -142 | +31.1% |
| 74 | Tama County Estimated | -143 | -652.6% |
| 75 | Buena Vista County Estimated | -148 | +60.3% |
| 76 | Clayton County Estimated | -150 | -552.2% |
| 77 | Hancock County Estimated | -154 | -152.5% |
| 78 | Fremont County Estimated | -157 | -441.4% |
| 79 | Benton County Estimated | -161 | -265.9% |
| 80 | Pottawattamie County Estimated | -176 | +28.5% |
| 81 | Hardin County Estimated | -180 | -46.3% |
| 82 | Floyd County Estimated | -181 | -20.7% |
| 83 | Carroll County Estimated | -191 | -2,628.6% |
| 84 | Clinton County Estimated | -192 | -6,500% |
| 85 | Sioux County Estimated | -195 | -19.6% |
| 86 | Dubuque County Estimated | -198 | -3,400% |
| 87 | Crawford County Estimated | -250 | +38.4% |
| 88 | Fayette County Estimated | -298 | -217% |
| 89 | Polk County Estimated | -309 | -159.2% |
| 90 | Cerro Gordo County Estimated | -327 | -93.5% |
| 91 | Des Moines County Estimated | -332 | -87.6% |
| 92 | Wapello County Estimated | -336 | -277.5% |
| 93 | Mills County Estimated | -344 | -2,557.1% |
| 94 | Muscatine County Estimated | -362 | +12.8% |
| 95 | Johnson County Estimated | -501 | +20.7% |
| 96 | Linn County Estimated | -528 | -131.6% |
| 97 | Woodbury County Estimated | -651 | -3,059.1% |
| 98 | Scott County Estimated | -884 | -89.3% |
| 99 | Black Hawk County Estimated | -895 | +36.9% |
Other periods
About this ranking
Estimated moves into a US state or county from elsewhere in the United States minus moves out to the rest of the country, from July 1 of the previous year through June 30 of the reported year. A negative value means more people left than arrived.
Sums to zero for the United States as a whole, so there is no national value.
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 domestic migration, states and counties, 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
APA 7
U.S. Census Bureau. (2026). Population Estimates Program: net domestic migration, states and counties, 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 domestic migration, July to June, 2020) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html
MLA 9
Population Estimates Program: net domestic migration, states and counties, 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 domestic migration, July to June, 2020. U.S. Census Bureau, 26 Mar. 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/iowa-counties?period=2020. Accessed 12 Oct. 2026.
Chicago (author-date)
U.S. Census Bureau. 2026. Population Estimates Program: net domestic migration, states and counties, 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 domestic migration, July to June, 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/net-domestic-migration-july-june/iowa-counties?period=2020.
Harvard
U.S. Census Bureau (2026) Population Estimates Program: net domestic migration, states and counties, 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 domestic migration, July to June, 2020 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/net-domestic-migration-july-june/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: net domestic migration, states and counties, 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 domestic migration, July to June, 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/net-domestic-migration-july-june/iowa-counties?period=2020. Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, 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 domestic migration, states and counties, 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 domestic migration, July to June, 2020
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-domestic-migration-july-june/iowa-counties?period=2020
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/iowa-counties?period=2020.
N1 - Publisher attribution: U.S. Census Bureau. Population Estimates Program: net domestic migration, states and counties, 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 -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Iowa by net domestic migration, July to June using official data, and cite the source.
rank_places {"indicator":"net_domestic_migration_july_june","level":"province","within":"Iowa","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=net_domestic_migration_july_june&level=province&within=Iowa&limit=10Questions
Which county has the highest net domestic migration, July to June?
Dallas County, with 2,387 in 2020, according to the U.S. Census Bureau.
Which county has the lowest net domestic migration, July to June?
Black Hawk County, with -895 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: net domestic migration, states and counties, 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.