Irish Population in Louisiana by County : 2025 Ranking & Insights

According to U.S. Census estimates, the Irish population in Louisiana stands at 298,917. Every county reports a non-zero population, with St. Tammany Parish leading at 34,206, followed by Jefferson Parish (31,453) and East Baton Rouge Parish (24,150). The combined total across counties is slightly lower than the statewide figure - a gap that may reflect rounding, data lag, or unassigned residents in certain census tracts. This analysis ranks all counties in Louisiana by their Irish population, offering a localized perspective on how the community is distributed across the state.

Top 5 counties with the largest Irish population in Louisiana

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  • 1
    St. Tammany Parish
    Irish population in St. Tammany Parish is 34,206
    12.70% of St. Tammany Parish population is Irish
  • 2
    Jefferson Parish
    Irish population in Jefferson Parish is 31,453
    7.27% of Jefferson Parish population is Irish
  • 3
    East Baton Rouge Parish
    Irish population in East Baton Rouge Parish is 24,150
    5.33% of East Baton Rouge Parish population is Irish
  • 4
    Orleans Parish
    Irish population in Orleans Parish is 22,704
    6.04% of Orleans Parish population is Irish
  • 5
    Livingston Parish
    Irish population in Livingston Parish is 15,844
    10.88% of Livingston Parish population is Irish

Overview of Irish population in Louisiana

  • Population Count and Percentage: American Community Survey documents Louisiana with 298,917 Irish residents (6.5% of 4.6 million total state population), ranking the state at the 39th percentile nationally among U.S. jurisdictions for Irish demographic representation.
  • Comparison to State and National Averages: U.S. Census surveys show Louisiana's Irish demographic representation of 6.5% remains below the national average of 9.4%, positioning the state below typical U.S. demographic distribution patterns.
  • Share of Total National Population: Official American Community Survey data indicates Louisiana contains 298,917 Irish residents, representing less than 1% of the nation's total Irish population of 31.2 million, constituting a minimal fraction of the national demographic community relative to the state's overall population size.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey data indicates Louisiana maintains 6.9 Irish Americans per square mile, marginally below the national average of 8.8 per square mile, placing the state near national demographic representation levels.
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59 Counties in Louisiana Ranked by Irish Population

View Methodology
American Community Survey data [1] show Irish populations across every county in Louisiana, with demographic distributions ranging from the highest population in St. Tammany Parish to the lowest in $rank_n_geo_name. The table below provides broader statistics, including total population figures, density measures, and demographic distributions based on current ACS data for all counties included in this analysis*.
counties in Louisiana ranked by Irish population count
Rank by Irish Population
County
Irish Population
% of Total County Population
% of Total Louisiana Irish Population
5 Year Rank Trend
1 St. Tammany Parish 34,206 12.70% 11.44%
2 Jefferson Parish 31,453 7.27% 10.52%
3 East Baton Rouge Parish 24,150 5.33% 8.08%
4 Orleans Parish 22,704 6.04% 7.60%
5 Livingston Parish 15,844 10.88% 5.30%
6 Caddo Parish 13,477 5.78% 4.51%
7 Lafayette Parish 13,197 5.38% 4.41%
8 12,716 6.09% 4.25%
9 10,744 7.95% 3.59%
10 10,477 6.59% 3.51%
11 8,833 6.87% 2.96%
12 8,286 6.42% 2.77%
13 6,555 5.10% 2.19%
14 4,075 8.46% 1.36%
15 4,021 3.75% 1.35%
16 3,988 8.82% 1.33%
17 3,589 3.71% 1.20%
18 3,045 8.31% 1.02%
19 3,009 4.35% 1.01%
20 2,748 14.03% 0.92%
21 2,470 5.17% 0.83%
22 2,462 6.80% 0.82%
23 2,313 8.60% 0.77%
24 2,204 5.63% 0.74%
25 2,144 3.76% 0.72%
26 2,092 4.32% 0.70%
27 2,014 2.45% 0.67%
28 1,969 5.31% 0.66%
29 1,824 6.09% 0.61%
30 1,810 8.20% 0.61%
31 1,766 11.82% 0.59%
32 1,748 7.75% 0.58%
33 1,708 3.31% 0.57%
34 1,705 6.83% 0.57%
35 1,598 8.03% 0.53%
36 1,573 2.75% 0.53%
37 1,520 15.80% 0.51%
38 1,518 4.73% 0.51%
39 1,483 8.09% 0.50%
40 1,452 6.94% 0.49%
41 1,377 4.28% 0.46%
42 1,309 9.69% 0.44%
43 1,168 6.03% 0.39%
44 1,097 4.96% 0.37%
45 1,034 10.81% 0.35%
46 1,030 6.70% 0.34%
47 998 7.82% 0.33%
48 925 6.25% 0.31%
49 825 2.98% 0.28%
50 675 3.30% 0.23%
51 531 4.89% 0.18%
52 514 2.48% 0.17%
53 490 5.61% 0.16%
54 443 5.88% 0.15%
55 408 2.91% 0.14%
56 249 6.24% 0.08%
57 222 3.09% 0.07%
58 213 1.08% 0.07%
59 196 2.01% 0.07%
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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 county in Louisiana 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 county. To provide additional context, we’ve also included two key percentages:
  1. % of Total County Population – This shows what percentage of the total state population identifies as Irish .
  2. % of Total Louisiana 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.
  • County 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.