Irish Population in Benton County, OR by City : 2025 Ranking & Insights

Irish population in Benton County, OR is estimated at 11,399, with all five of its incorporated cities - Corvallis (6,754), Albany (6,158), Philomath (1,092), Monroe (114), and Adair Village (99) - showing some presence. In this case, the sum of all city-level figures exceeds the county total, which may occur due to independent estimation methods used at different geographic levels. The section below unpacks how Irish communities take shape across Oregon and other small multi-city counties.

Top 5 cities with the largest Irish population in Benton County

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  • 1
    Corvallis
    Irish population in Corvallis is 6,754
    11.18% of Corvallis population is Irish
  • 2
    Albany
    Irish population in Albany is 6,158
    10.85% of Albany population is Irish
  • 3
    Philomath
    Irish population in Philomath is 1,092
    19.72% of Philomath population is Irish
  • 4
    Monroe
    Irish population in Monroe is 114
    12.71% of Monroe population is Irish
  • 5
    Adair Village
    Irish population in Adair Village is 99
    8.68% of Adair Village population is Irish

Overview of Irish population in Benton County

  • Population Count and Percentage: American Community Survey data document Benton County with 11,399 Irish residents (11.8% of 96,359 total county population), placing the jurisdiction at the 81st percentile nationally among counties and 67th percentile within Oregon for Irish population density, with demographic concentrations among the highest nationwide.
  • Comparison to State and National Averages: Census Bureau's ACS show Benton County's Irish population of 11.8% surpassing both Oregon's state average of 10.9% 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 documents Benton County with 11,399 Irish residents, representing 2.5% of Oregon's total Irish population of 461,857.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate Benton County's density of 16.9 Irish Americans per square mile exceeds Oregon's average of 4.8 per square mile by three and a half times, establishing the county as a significant concentration center for Irish demographic communities.
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Benton County Cities Ranked by Irish Population

View Methodology
American Community Survey data [1] indicate Irish populations across all five cities, led by Corvallis with 6,754 residents, followed by Albany with 6,158 residents. The table below provides broader statistics, including total population figures, density measures, and demographic distributions based on current ACS data for the five incorporated cities included in this analysis*.
cities in Benton County, OR ranked by Irish population count
Rank by Irish Population
City
Irish Population
% of Total City Population
% of Total Benton County Irish Population
5 Year Rank Trend
1 Corvallis 6,754 11.18% 59.25%
2 Albany 6,158 10.85% 54.02%
3 Philomath 1,092 19.72% 9.58%
4 Monroe 114 12.71% 1.00%
5 Adair Village 99 8.68% 0.87%
Need the complete table? Full rankings and the underlying data sets for California and other locations are available for purchase or license.

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 Benton County, OR 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:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Irish .
  2. % of Total Benton 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

  1. 2019-2023 5-Year Estimates.
  2. 2023.