Counties in Colorado by net international migration, July to June
Arapahoe County had the highest net international migration, July to June of 64 counties in 2021, at 970. Huerfano County had the lowest, at -1. The median was 5 and the figure for Colorado was 3,917. Source: the U.S. Census Bureau.
Map of counties, 2021
- Under 0
- 0 to 2
- 2 to 12
- 12 and over
Top 40 counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Arapahoe County Estimated | 970 | +24.5% |
| 2 | Denver County Estimated | 703 | +19.6% |
| 3 | Adams County Estimated | 480 | +53.8% |
| 4 | Boulder County Estimated | 334 | +15.6% |
| 5 | Douglas County Estimated | 248 | +35.5% |
| 6 | Jefferson County Estimated | 225 | +7.7% |
| 7 | Larimer County Estimated | 179 | +10.5% |
| 7 | Weld County Estimated | 179 | +86.5% |
| 9 | Morgan County Estimated | 94 | +14.6% |
| 10 | Broomfield County Estimated | 58 | +45% |
| 11 | El Paso County Estimated | 57 | -26% |
| 12 | Garfield County Estimated | 47 | +4,600% |
| 13 | Yuma County Estimated | 40 | +60% |
| 14 | Eagle County Estimated | 38 | -26.9% |
| 15 | Mesa County Estimated | 30 | |
| 16 | Pueblo County Estimated | 27 | +1,250% |
| 17 | Montrose County Estimated | 24 | +400% |
| 18 | Pitkin County Estimated | 18 | -60% |
| 19 | Montezuma County Estimated | 16 | +633.3% |
| 20 | Summit County Estimated | 13 | -72.9% |
| 21 | Prowers County Estimated | 12 | |
| 22 | Alamosa County Estimated | 10 | +433.3% |
| 22 | La Plata County Estimated | 10 | +900% |
| 22 | Phillips County Estimated | 10 | -68.8% |
| 22 | Routt County Estimated | 10 | -50% |
| 26 | Grand County Estimated | 9 | +12.5% |
| 27 | Delta County Estimated | 8 | +500% |
| 27 | Gilpin County Estimated | 8 | |
| 29 | Fremont County Estimated | 7 | +800% |
| 29 | Logan County Estimated | 7 | +200% |
| 29 | Rio Blanco County Estimated | 7 | 0% |
| 32 | Teller County Estimated | 5 | +600% |
| 33 | Chaffee County Estimated | 4 | -20% |
| 33 | Cheyenne County Estimated | 4 | +300% |
| 33 | Elbert County Estimated | 4 | -20% |
| 33 | Las Animas County Estimated | 4 | -71.4% |
| 33 | San Miguel County Estimated | 4 | -76.5% |
| 38 | Clear Creek County Estimated | 3 | -62.5% |
| 39 | Archuleta County Estimated | 2 | -66.7% |
| 39 | Lincoln County Estimated | 2 | -33.3% |
| 39 | Otero County Estimated | 2 | +300% |
| 39 | Park County Estimated | 2 | -33.3% |
| 43 | Baca County Estimated | 1 | 0% |
| 43 | Gunnison County Estimated | 1 | |
| 43 | Lake County Estimated | 1 | -50% |
| 43 | Ouray County Estimated | 1 | +200% |
| 43 | Rio Grande County Estimated | 1 | +200% |
| 43 | Washington County Estimated | 1 | +200% |
| 49 | Bent County Estimated | 0 | -100% |
| 49 | Conejos County Estimated | 0 | -100% |
| 49 | Custer County Estimated | 0 | |
| 49 | Dolores County Estimated | 0 | |
| 49 | Hinsdale County Estimated | 0 | |
| 49 | Jackson County Estimated | 0 | -100% |
| 49 | Kiowa County Estimated | 0 | -100% |
| 49 | Kit Carson County Estimated | 0 | -100% |
| 49 | Mineral County Estimated | 0 | |
| 49 | Moffat County Estimated | 0 | +100% |
| 49 | Saguache County Estimated | 0 | -100% |
| 49 | San Juan County Estimated | 0 | |
| 49 | Sedgwick County Estimated | 0 | |
| 62 | Costilla County Estimated | -1 | -114.3% |
| 62 | Crowley County Estimated | -1 | -120% |
| 62 | Huerfano County Estimated | -1 |
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 Colorado 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 Colorado 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/colorado-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 Colorado 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/colorado-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 Colorado 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/colorado-counties?period=2021 (Accessed: 12 October 2026).
BibTeX
@misc{census_counties_in_colorado_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 Colorado 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/colorado-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 Colorado 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/colorado-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-international-migration-july-june/colorado-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
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 Colorado 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":"Colorado","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=net_international_migration_july_june&level=province&within=Colorado&limit=10Questions
Which county has the highest net international migration, July to June?
Arapahoe County, with 970 in 2021, according to the U.S. Census Bureau.
Which county has the lowest net international migration, July to June?
Huerfano 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.