Distribution of Irish People in the US

Explore the map and tables to see where people of this ethnic group have settled in the United States by county and state. Ethnic and ancestry information for these tables includes people of partial descent and is based on self identification.

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Top counties by %
Top counties by population
Top states by %
Top states by population
Source Information

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Counties by Percentage of Population: Irish

KEY
5.15%
10.3%
15.45%
20.6%
30.9%
41.2%
51.5%

See other ethnic groups :

Top 20 Counties by % Population

#	County	Percentage
1	Plymouth County, Massachusetts	30.79%
2	Cape May County, New Jersey	29.29%
3	Silver Bow County, Montana	28.97%
4	Gloucester County, New Jersey	26.69%
5	Real County, Texas	26.59%
6	Norfolk County, Massachusetts	26.49%
7	Barnstable County, Massachusetts	26.41%
8	Rensselaer County, New York	25.3%
9	Washington County, Rhode Island	25.23%
10	Deer Lodge County, Montana	25.19%
11	Kent County, Rhode Island	24.91%
12	Delaware County, Pennsylvania	24.86%
13	Lackawanna County, Pennsylvania	24.67%
14	Rockingham County, New Hampshire	23.93%
15	Pike County, Pennsylvania	23.69%
16	Bucks County, Pennsylvania	23.68%
17	Greeley County, Nebraska	23.65%
18	Saratoga County, New York	23.56%
19	Blount County, Alabama	23.37%
20	Newport County, Rhode Island	23.24%

Top Counties by Population of Irish

#	County	Population
1	Cook County, Illinois	470,277
2	Los Angeles County, California	367,103
3	Maricopa County, Arizona	362,889
4	Middlesex County, Massachusetts	315,100
5	Suffolk County, New York	273,605
6	San Diego County, California	260,586
7	Allegheny County, Pennsylvania	224,474
8	Harris County, Texas	211,392
9	Orange County, California	209,344
10	King County, Washington	199,414
11	Nassau County, New York	187,606
12	Norfolk County, Massachusetts	184,957
13	Montgomery County, Pennsylvania	174,472
14	Philadelphia County, Pennsylvania	168,194
15	Essex County, Massachusetts	159,974
16	Clark County, Nevada	158,902
17	Plymouth County, Massachusetts	157,707
18	Worcester County, Massachusetts	156,842
19	Cuyahoga County, Ohio	153,666
20	Erie County, New York	153,048

Top States and Territories by Percentage

#	State	Percentage	Population
1	New Hampshire	20.47%	274,991
2	Massachusetts	20.17%	1,377,769
3	Rhode Island	17.81%	188,228
4	Vermont	17.03%	106,443
5	Maine	16.76%	223,315
6	Pennsylvania	15.89%	2,032,883
7	Connecticut	15.32%	548,561
8	Delaware	14.27%	135,518
9	West Virginia	13.8%	252,421
10	New Jersey	13.65%	1,212,172
11	Montana	13.57%	141,379
12	Iowa	13.13%	411,302
13	Ohio	12.95%	1,507,967
14	Missouri	12.63%	768,876
15	Nebraska	12.5%	238,178
16	Kentucky	11.75%	521,594
17	Kansas	11.52%	334,984
18	Wyoming	11.38%	66,227
19	New York	11.31%	2,219,416
20	Illinois	11.25%	1,442,684
21	Oregon	11.2%	457,003
22	Colorado	11.11%	614,282
23	Indiana	10.97%	728,310
24	Wisconsin	10.75%	621,223
25	Oklahoma	10.45%	409,333
26	Washington	10.41%	759,440
27	Michigan	10.41%	1,036,095
28	Maryland	10.22%	613,305
29	South Dakota	10.19%	88,088
30	Minnesota	10.16%	561,530
31	Arkansas	10.08%	301,536
32	Alaska	9.77%	72,123
33	Tennessee	9.56%	635,559
34	Virginia	9.29%	781,907
35	Idaho	9.25%	156,107
36	South Carolina	9.07%	449,504
37	Arizona	8.66%	601,921
38	Nevada	8.57%	250,390
39	Florida	8.54%	1,759,474
40	Alabama	8.39%	408,059
41	North Carolina	8.25%	838,165
42	North Dakota	7.64%	57,485
43	Georgia	7.39%	760,904
44	Mississippi	7.33%	219,145
45	Louisiana	6.78%	316,076
46	District of Columbia	6.75%	46,178
47	Texas	6.29%	1,753,958
48	California	6.12%	2,396,639
49	New Mexico	5.9%	123,424
50	Utah	5.61%	170,857
51	Hawaii	4.33%	61,557
52	Puerto Rico	0.03%	1,036

Top States and Territories by Population of Irish

#	State	Population
1	California	2,396,639
2	New York	2,219,416
3	Pennsylvania	2,032,883
4	Florida	1,759,474
5	Texas	1,753,958
6	Ohio	1,507,967
7	Illinois	1,442,684
8	Massachusetts	1,377,769
9	New Jersey	1,212,172
10	Michigan	1,036,095
11	North Carolina	838,165
12	Virginia	781,907
13	Missouri	768,876
14	Georgia	760,904
15	Washington	759,440
16	Indiana	728,310
17	Tennessee	635,559
18	Wisconsin	621,223
19	Colorado	614,282
20	Maryland	613,305
21	Arizona	601,921
22	Minnesota	561,530
23	Connecticut	548,561
24	Kentucky	521,594
25	Oregon	457,003
26	South Carolina	449,504
27	Iowa	411,302
28	Oklahoma	409,333
29	Alabama	408,059
30	Kansas	334,984
31	Louisiana	316,076
32	Arkansas	301,536
33	New Hampshire	274,991
34	West Virginia	252,421
35	Nevada	250,390
36	Nebraska	238,178
37	Maine	223,315
38	Mississippi	219,145
39	Rhode Island	188,228
40	Utah	170,857
41	Idaho	156,107
42	Montana	141,379
43	Delaware	135,518
44	New Mexico	123,424
45	Vermont	106,443
46	South Dakota	88,088
47	Alaska	72,123
48	Wyoming	66,227
49	Hawaii	61,557
50	North Dakota	57,485
51	District of Columbia	46,178
52	Puerto Rico	1,036

Source Data

This data was sourced from the 2013-2018 American Communities Survey. As this is freely available government data, feel free to use and share these numbers and metrics.