Data / Rankings / Foreign-born population share / Counties in Colorado

Counties in Colorado by foreign-born share of the population

Arapahoe County had the highest foreign-born share of the population of 64 counties in 2021, at 15.6%. Hinsdale County had the lowest, at 0.5%. The median was 4.7% and the figure for Colorado was 9.5%. Source: the U.S. Census Bureau.

Highest15.6Arapahoe County
Lowest0.5Hinsdale County
Median4.764 counties
Colorado9.5History

Top 40 counties, 2021

CSVChart (SVG)

Arapahoe CountyArapahoe County: 15.6 %15.6Eagle CountyEagle County: 15.3 %15.3Adams CountyAdams County: 15 %15Garfield CountyGarfield County: 14.3 %14.3Denver CountyDenver County: 14.2 %14.2Phillips CountyPhillips County: 13.8 %13.8Yuma CountyYuma County: 13.7 %13.7Morgan CountyMorgan County: 13 %13Pitkin CountyPitkin County: 12 %12Lake CountyLake County: 10.9 %10.9Prowers CountyProwers County: 10.6 %10.6Broomfield CountyBroomfield County: 10.3 %10.3Boulder CountyBoulder County: 9.9 %9.9San Juan CountySan Juan County: 9.7 %9.7Weld CountyWeld County: 8.9 %8.9San Miguel CountySan Miguel County: 8.6 %8.6Douglas CountyDouglas County: 7.7 %7.7Alamosa CountyAlamosa County: 7.6 %7.6Montrose CountyMontrose County: 7.6 %7.6El Paso CountyEl Paso County: 6.8 %6.8Jefferson CountyJefferson County: 6.3 %6.3Kit Carson CountyKit Carson County: 6.1 %6.1Moffat CountyMoffat County: 5.9 %5.9Cheyenne CountyCheyenne County: 5.9 %5.9Larimer CountyLarimer County: 5.8 %5.8Summit CountySummit County: 5.8 %5.8Saguache CountySaguache County: 5.7 %5.7Sedgwick CountySedgwick County: 5.5 %5.5Costilla CountyCostilla County: 5.4 %5.4Routt CountyRoutt County: 5.1 %5.1Gilpin CountyGilpin County: 4.9 %4.9Delta CountyDelta County: 4.8 %4.8Rio Blanco CountyRio Blanco County: 4.6 %4.6Logan CountyLogan County: 4.3 %4.3Lincoln CountyLincoln County: 4.2 %4.2Baca CountyBaca County: 4.2 %4.2Rio Grande CountyRio Grande County: 4.2 %4.2Grand CountyGrand County: 4.1 %4.1Las Animas CountyLas Animas County: 4 %4Mesa CountyMesa County: 3.9 %3.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)
1Arapahoe County15.6
2Eagle County15.3
3Adams County15
4Garfield County14.3
5Denver County14.2
6Phillips County13.8
7Yuma County13.7
8Morgan County13
9Pitkin County12
10Lake County10.9
11Prowers County10.6
12Broomfield County10.3
13Boulder County9.9
14San Juan County9.7
15Weld County8.9
16San Miguel County8.6
17Douglas County7.7
18Alamosa County7.6
19Montrose County7.6
20El Paso County6.8
21Jefferson County6.3
22Kit Carson County6.1
23Moffat County5.9
24Cheyenne County5.9
25Larimer County5.8
25Summit County5.8
27Saguache County5.7
28Sedgwick County5.5
29Costilla County5.4
30Routt County5.1
31Gilpin County4.9
32Delta County4.8
33Rio Blanco County4.6
34Logan County4.3
35Lincoln County4.2
36Baca County4.2
36Rio Grande County4.2
38Grand County4.1
39Las Animas County4
40Mesa County3.9
41Archuleta County3.9
42Gunnison County3.8
43Clear Creek County3.7
44Montezuma County3.6
45Pueblo County3.5
46Custer County3.4
47Chaffee County3.3
47Otero County3.3
49Bent County3
50La Plata County2.7
51Elbert County2.6
52Washington County2.6
53Conejos County2.6
54Fremont County2.4
55Teller County2.4
56Crowley County2.2
57Huerfano County2.1
58Jackson County1.9
59Ouray County1.9
60Park County1.6
61Mineral County1.4
62Dolores County1.1
63Kiowa County0.7
64Hinsdale County0.5

Other periods

About this ranking

People who were not US citizens at birth, as a percentage of the total population. Includes naturalized citizens, lawful permanent residents, temporary migrants and unauthorized immigrants. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Based on place of birth, not nationality: a naturalized citizen counts as foreign born, and people born in Puerto Rico, the US island areas or abroad to American parents count as native. Not comparable with foreign_population_share, which counts foreign nationals in Spain and the EU. Calculated from counts in ACS table B05002, which are stored as inputs.

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. American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2021/table-based-SF/data/5YRData/acsdt5y2021-b05002.dat. Retrieved 2026-10-09.

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 foreign-born share of the population using official data, and cite the source.
rank_places {"indicator":"foreign_born_share","level":"province","within":"Colorado","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=foreign_born_share&level=province&within=Colorado&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest foreign-born share of the population?

Arapahoe County, with 15.6% in 2021, according to the U.S. Census Bureau.

Which county has the lowest foreign-born share of the population?

Hinsdale County, with 0.5% 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, American Community Survey 5-year estimates, table B05002: foreign-born population as a percentage of the total population, calculated with stored inputs. Retrieved 2026-10-09.

Foreign-born population share: other rankings

Counties in Colorado: more rankings