Ranking of Colorado Counties By Population with Australian Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 2.81K people in Colorado with Australian ancestry. Among all Colorado counties, Douglas County had the highest population with Australian ancestry (457), followed by Arapahoe County (393), and Boulder County (317).

The chart and table below shows the top 10 counties with high number of people with Australian ancestry.

You can see similar information for other states and for other ancestry groups in Colorado.

Data Source: US Census Bureau.
Ranking of Colorado Counties By Population with Australian Ancestry in 2021
Douglas County
Arapahoe County
Boulder County
Jefferson County
El Paso County
Denver County
Adams County
Larimer County
Mesa County
Eagle County
Ranking of Colorado Counties By Population with Australian Ancestry in 2021
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Rank County Population
1 Douglas County 457
2 Arapahoe County 393
3 Boulder County 317
4 Jefferson County 294
5 El Paso County 284
6 Denver County 281
7 Adams County 206
8 Larimer County 197
9 Mesa County 65
10 Eagle County 57
11 Lake County 37
12 Logan County 31
13 Pitkin County 28
13 San Miguel County 28
14 Weld County 27
15 Baca County 18
15 Park County 18
16 La Plata County 14
17 Delta County 13
18 Archuleta County 11
19 Broomfield County 9
20 Garfield County 8
20 Montezuma County 8
21 Kit Carson County 6
22 Custer County 2
22 Huerfano County 2
23 Ouray County 1