Counties in Montana by net international migration, July to June
Gallatin County had the highest net international migration, July to June of 56 counties in 2021, at 131. Big Horn County had the lowest, at -1. The median was 2 and the figure for Montana was 712. Source: the U.S. Census Bureau.
Map of counties, 2021
- Under 0
- 0 to 4
- 4 and over
All counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Gallatin County Estimated | 131 | -41.3% |
| 2 | Yellowstone County Estimated | 106 | -24.8% |
| 3 | Flathead County Estimated | 95 | +227.6% |
| 4 | Missoula County Estimated | 81 | -65.8% |
| 5 | Silver Bow County Estimated | 71 | +20.3% |
| 6 | Lewis and Clark County Estimated | 38 | -9.5% |
| 7 | Ravalli County Estimated | 32 | +14.3% |
| 8 | Madison County Estimated | 26 | +23.8% |
| 9 | Lincoln County Estimated | 20 | -31% |
| 10 | Lake County Estimated | 17 | -10.5% |
| 11 | Carbon County Estimated | 11 | +57.1% |
| 12 | Richland County Estimated | 10 | +600% |
| 13 | Deer Lodge County Estimated | 9 | |
| 14 | Toole County Estimated | 8 | |
| 15 | Park County Estimated | 7 | +75% |
| 15 | Valley County Estimated | 7 | +133.3% |
| 17 | Pondera County Estimated | 6 | -25% |
| 18 | Rosebud County Estimated | 5 | -54.5% |
| 19 | Hill County Estimated | 4 | -75% |
| 19 | Roosevelt County Estimated | 4 | -50% |
| 21 | Dawson County Estimated | 3 | +50% |
| 21 | Fallon County Estimated | 3 | +50% |
| 21 | Mineral County Estimated | 3 | +400% |
| 21 | Sanders County Estimated | 3 | +200% |
| 25 | Cascade County Estimated | 2 | -94.7% |
| 25 | Fergus County Estimated | 2 | -81.8% |
| 25 | Granite County Estimated | 2 | +100% |
| 25 | Teton County Estimated | 2 | -84.6% |
| 29 | Broadwater County Estimated | 1 | |
| 29 | Chouteau County Estimated | 1 | |
| 29 | Custer County Estimated | 1 | -80% |
| 29 | Sheridan County Estimated | 1 | |
| 29 | Sweet Grass County Estimated | 1 | |
| 34 | Beaverhead County Estimated | 0 | -100% |
| 34 | Blaine County Estimated | 0 | -100% |
| 34 | Carter County Estimated | 0 | |
| 34 | Daniels County Estimated | 0 | |
| 34 | Garfield County Estimated | 0 | |
| 34 | Glacier County Estimated | 0 | -100% |
| 34 | Golden Valley County Estimated | 0 | |
| 34 | Jefferson County Estimated | 0 | |
| 34 | Judith Basin County Estimated | 0 | |
| 34 | Liberty County Estimated | 0 | |
| 34 | McCone County Estimated | 0 | |
| 34 | Meagher County Estimated | 0 | -100% |
| 34 | Musselshell County Estimated | 0 | |
| 34 | Petroleum County Estimated | 0 | |
| 34 | Phillips County Estimated | 0 | |
| 34 | Powder River County Estimated | 0 | |
| 34 | Powell County Estimated | 0 | -100% |
| 34 | Prairie County Estimated | 0 | |
| 34 | Stillwater County Estimated | 0 | -100% |
| 34 | Treasure County Estimated | 0 | |
| 34 | Wheatland County Estimated | 0 | |
| 34 | Wibaux County Estimated | 0 | |
| 56 | Big Horn County Estimated | -1 | -114.3% |
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
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 Montana by net international migration, July to June, 2021) [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 Montana by net international migration, July to June, 2021. 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/montana-counties?period=2021. 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 Montana by net international migration, July to June, 2021. 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/montana-counties?period=2021.
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 Montana by net international migration, July to June, 2021 [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/montana-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_montana_by_2021,
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 Montana by net international migration, July to June, 2021}},
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/montana-counties?period=2021. 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 Montana by net international migration, July to June, 2021
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/montana-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-july-june/montana-counties?period=2021.
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 -
Use this data in your AI agent
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Rank Counties in Montana by net international migration, July to June using official data, and cite the source.
rank_places {"indicator":"net_international_migration_july_june","level":"province","within":"Montana","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=net_international_migration_july_june&level=province&within=Montana&limit=10Questions
Which county has the highest net international migration, July to June?
Gallatin County, with 131 in 2021, according to the U.S. Census Bureau.
Which county has the lowest net international migration, July to June?
Big Horn County, with -1 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, 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 Montana: more rankings
- Residents who moved from another state in the past year
- School enrolment, children aged 3 and 4
- Bachelor's degree or higher, population 25 and over
- Net domestic migration rate, July to June
- Adult cigarette smoking rate, local model estimate
- Traffic fatalities
- Diagnosed diabetes in adults, local model estimate
- High cholesterol in screened adults, local model estimate