US Population with Irish Ancestry By State in 2021 (ACS-5yrs)

Updated on March 1, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, the US population with Irish ancestry was 31.54M, which was 9.56% of the total US population.

Among US states, California had the highest number of people with Irish ancestry (2.32M), followed by New York (2.19M), and Pennsylvania (1.97M).

The chart below shows the number and percentage of people with Irish ancestry for each state. The information can also be found in the table below.

You can see similar information for other ancestry groups in the US.

Related Topics: US Census 2021 Topic List.

Data Source: US Census Bureau.

US Population with Irish Ancestry By State in 2021

< 50K

50K - 100K

100K - 500K

500K - 1M

1M - 2M

Over 2M

US population with Irish Ancestry By State in 2021

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State	Population	% of State Pop. (%)
Alabama	397272	7.95
Alaska	71433	9.71
Arizona	614921	8.69
Arkansas	279619	9.30
California	2319360	5.88
Colorado	620602	10.84
Connecticut	528983	14.67
Delaware	139618	14.22
Florida	1761730	8.26
Georgia	733593	6.90
Hawaii	63327	4.36
Idaho	165573	9.14
Illinois	1397290	10.90
Indiana	701018	10.38
Iowa	407893	12.83
Kansas	329838	11.25
Kentucky	501580	11.16
Louisiana	305734	6.57
Maine	222255	16.38
Maryland	593042	9.65
Massachusetts	1345219	19.24
Michigan	1007417	10.01
Minnesota	567291	10.00
Mississippi	205695	6.93
Missouri	750022	12.21
Montana	146233	13.57
Nebraska	229936	11.78
Nevada	244967	8.01
New Hampshire	281316	20.50
New Jersey	1185719	12.84
New Mexico	129661	6.15
New York	2187799	10.88
North Carolina	844650	8.15
North Dakota	57526	7.44
Ohio	1485000	12.62
Oklahoma	392544	9.94
Oregon	463718	11.02
Pennsylvania	1972515	15.21
Rhode Island	185945	17.03
South Carolina	437447	8.61
South Dakota	87238	9.89
Tennessee	638141	9.30
Texas	1735873	6.01
Utah	191873	5.94
Vermont	104395	16.27
Virginia	776721	9.05
Washington	767543	10.08
West Virginia	227982	12.66
Wisconsin	614201	10.46
Wyoming	66755	11.58
District of Columbia	50171	7.34