Counties in Colorado by net domestic migration, July to June
Douglas County had the highest net domestic migration, July to June of 64 counties in 2021, at 7,893. Denver County had the lowest, at -10,308. The median was 61 and the figure for Colorado was 6,200. Source: the U.S. Census Bureau.
Map of counties, 2021
- Under -100
- -100 to 0
- 0 to 100
- 100 to 400
- 400 and over
Top 40 counties, 2021
Full ranking
| Rank | Counties | 2021 | Change on 2020 |
|---|---|---|---|
| 1 | Douglas County Estimated | 7,893 | +13.9% |
| 2 | Weld County Estimated | 6,256 | -8.4% |
| 3 | Larimer County Estimated | 2,220 | -1.6% |
| 4 | Mesa County Estimated | 1,844 | +61.6% |
| 5 | Pueblo County Estimated | 1,661 | +2.8% |
| 6 | Elbert County Estimated | 943 | +68.4% |
| 7 | El Paso County Estimated | 916 | -62.3% |
| 8 | Broomfield County Estimated | 663 | -51.1% |
| 9 | Fremont County Estimated | 630 | +592.3% |
| 10 | Montrose County Estimated | 573 | -8.3% |
| 11 | Delta County Estimated | 542 | +164.4% |
| 12 | La Plata County Estimated | 457 | +464.2% |
| 13 | Montezuma County Estimated | 439 | +299.1% |
| 14 | Archuleta County Estimated | 407 | +57.1% |
| 15 | Custer County Estimated | 392 | +452.1% |
| 16 | Park County Estimated | 376 | +889.5% |
| 17 | Gunnison County Estimated | 303 | +422.4% |
| 18 | Teller County Estimated | 292 | +73.8% |
| 19 | Chaffee County Estimated | 273 | -30.7% |
| 20 | Huerfano County Estimated | 214 | +154.8% |
| 21 | Ouray County Estimated | 186 | +9,400% |
| 22 | Alamosa County Estimated | 157 | +291.5% |
| 23 | Routt County Estimated | 151 | +264.1% |
| 24 | Conejos County Estimated | 137 | +411.4% |
| 25 | Saguache County Estimated | 135 | +18.4% |
| 26 | Costilla County Estimated | 121 | +227% |
| 27 | Grand County Estimated | 95 | +3,266.7% |
| 28 | Crowley County Estimated | 93 | +133.7% |
| 29 | Washington County Estimated | 75 | +650% |
| 30 | Clear Creek County Estimated | 68 | +6,900% |
| 31 | Gilpin County Estimated | 66 | +560% |
| 32 | Dolores County Estimated | 62 | +29.2% |
| 33 | Mineral County Estimated | 59 | +168.2% |
| 34 | Baca County Estimated | 45 | +180.4% |
| 35 | San Juan County Estimated | 35 | +16.7% |
| 36 | Kiowa County Estimated | 0 | -100% |
| 36 | San Miguel County Estimated | 0 | +100% |
| 38 | Jackson County Estimated | -9 | 0% |
| 39 | Hinsdale County Estimated | -11 | -155% |
| 40 | Phillips County Estimated | -12 | +29.4% |
| 41 | Cheyenne County Estimated | -27 | +10% |
| 42 | Sedgwick County Estimated | -32 | -357.1% |
| 43 | Lake County Estimated | -34 | +76.9% |
| 44 | Otero County Estimated | -35 | -94.4% |
| 45 | Prowers County Estimated | -59 | -168.2% |
| 46 | Garfield County Estimated | -60 | -114.3% |
| 47 | Rio Blanco County Estimated | -70 | -191.7% |
| 48 | Pitkin County Estimated | -75 | +42.7% |
| 49 | Bent County Estimated | -84 | +59.6% |
| 50 | Las Animas County Estimated | -86 | -250.9% |
| 51 | Yuma County Estimated | -89 | -85.4% |
| 52 | Moffat County Estimated | -96 | +17.9% |
| 53 | Rio Grande County Estimated | -98 | -406.3% |
| 54 | Logan County Estimated | -107 | +74.9% |
| 55 | Kit Carson County Estimated | -117 | -82.8% |
| 56 | Lincoln County Estimated | -164 | -507.4% |
| 57 | Summit County Estimated | -198 | +55.7% |
| 58 | Morgan County Estimated | -235 | +0.8% |
| 59 | Eagle County Estimated | -291 | +58.5% |
| 60 | Adams County Estimated | -502 | -263.8% |
| 61 | Arapahoe County Estimated | -2,600 | -8.7% |
| 62 | Jefferson County Estimated | -2,933 | -556.2% |
| 63 | Boulder County Estimated | -4,247 | -975.7% |
| 64 | Denver County Estimated | -10,308 | -282.7% |
Other periods
About this ranking
Estimated moves into an area from elsewhere in the same country minus moves out to the rest of the country, from July 1 of the previous year through June 30 of the reported year.
More on how it is measured
- United States: states and counties.
- Canada: provinces and territories, net interprovincial migration (Statistics Canada).
- United Kingdom: local authorities, counting moves between any two UK local authorities, including across the borders of England, Wales, Scotland and Northern Ireland (ONS internal migration).
- A negative value means more people left than arrived.
Sums to zero, or close to it, for each country 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 Colorado by net domestic 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 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 Colorado by net domestic 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-domestic-migration-july-june/colorado-counties?period=2021. 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 Colorado by net domestic 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-domestic-migration-july-june/colorado-counties?period=2021.
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 Colorado by net domestic 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-domestic-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 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 Colorado by net domestic 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-domestic-migration-july-june/colorado-counties?period=2021. 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 Colorado by net domestic 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-domestic-migration-july-june/colorado-counties?period=2021
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/net-domestic-migration-july-june/colorado-counties?period=2021.
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
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Rank Counties in Colorado 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":"Colorado","limit":10}
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Which county has the highest net domestic migration, July to June?
Douglas County, with 7,893 in 2021, according to the U.S. Census Bureau.
Which county has the lowest net domestic migration, July to June?
Denver County, with -10,308 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 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.