Irish Population in Washington County, ID by City : 2025 Ranking & Insights
Irish residents in Washington County, ID total 1,474 people, according to the latest U.S. Census estimates. Of that, 648 live in Weiser - the only incorporated city in Washington County included in this analysis* - while the remaining population appears to reside in unincorporated parts of the county or smaller incorporated cities not captured in this ranking. This pattern suggests a blended distribution across both urban and rural areas of Washington County. The sections below explores how the Irish community is spread across the county and how it compares with similar rural populations throughout Idaho.
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Top 5 cities with the largest Irish population in Washington County
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1WeiserIrish population in Weiser is 64811.17% of Weiser population is Irish
Overview of Irish population in Washington County
- Population Count and Percentage: American Community Survey data document Washington County with 1,474 Irish residents (13.6% of 10,866 total county population), placing the jurisdiction at the 35th percentile nationally among counties and 55th percentile within Idaho for Irish population density, with demographic concentrations among the highest nationwide.
- Comparison to State and National Averages: Census Bureau's ACS show Washington County's Irish population of 13.6% surpassing both Idaho's state average of 9.2% and the national average of 9.4%, positioning the county as a high-concentration jurisdiction exceeding demographic benchmarks across all geographic scales.
- Share of Total State Population: Official American Community Survey data indicates Washington County contains 1,474 Irish residents, representing less than 1% of Idaho's total Irish population of 175,128.
- Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate Washington County's density of 1 Irish Americans per square mile remains below Idaho's average of 2.1 per square mile, with relatively sparse community distribution compared to state demographic concentrations.
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Irish Population in Washington County — Weiser
Methodology
This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in Washington County, ID by their Irish population, using the most recent ACS data available.
How the Census defines Irish population
The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Irish ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
- Some people identify as Irish alone, while others identify as Irish along with another race (such as Irish and German).
- We’ve used the “Irish alone or in any combination” category unless noted otherwise, which gives a broader picture of the Irish population in each area.
How We Ranked the Data
This ranking is based on the total number of people who identified as Irish alone or in combination in city. To provide additional context, we’ve also included two key percentages:
- % of Total City Population – This shows what percentage of the total state population identifies as Irish .
- % of Total Washington County Irish Population – This tells us how much of the entire U.S. Irish population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.
Things to Keep in Mind
Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
- In places with very small Irish populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
- Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
- City that don’t have any reported Irish population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Irish populations are most concentrated while keeping the numbers easy to understand.
Sources
- U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
- U.S. Census Bureau TIGER/Line Shapefiles 2023.