The Welsh-American Population

Pennsylvania has the largest number of Welsh residents, whereas Utah has the highest percentage. Here is a look at the population across all 50 states: 

Rank	State	Welsh-American Population	Rank	State	Welsh-American Population, as a Percent of Total Population
	United States	1,793,356	1	Utah	2.06%
1	Pennsylvania	174,569	2	Pennsylvania	1.37%
2	California	162,550	3	Idaho	1.16%
3	Ohio	126,572	4	Vermont	1.12%
4	Texas	96,675	5	Ohio	1.10%
5	Florida	91,341	6	Wyoming	1.07%
6	New York	85,773	7	Oregon	1.01%
7	Washington	66,315	8	Delaware	0.99%
8	Virginia	57,312	9	Washington	0.98%
9	Utah	57,205	10	Colorado	0.92%
10	North Carolina	52,532	11	Montana	0.92%
11	Colorado	46,566	12	Alaska	0.83%
12	Illinois	45,902	13	Maine	0.80%
13	Michigan	45,234	14	West Virginia	0.74%
14	Maryland	42,227	15	Kansas	0.73%
15	Arizona	39,430	16	Maryland	0.73%
16	Oregon	38,876	17	Virginia	0.71%
17	Missouri	38,281	18	Nebraska	0.71%
18	Georgia	38,145	19	Iowa	0.68%
19	New Jersey	37,716	20	Nevada	0.65%
20	Indiana	36,162	21	Missouri	0.64%
21	Tennessee	33,646	22	New Hampshire	0.64%
22	Wisconsin	25,833	23	Arizona	0.61%
23	Massachusetts	22,854	24	South Dakota	0.60%
24	South Carolina	21,584		United States	0.58%
25	Minnesota	21,337	25	Indiana	0.56%
26	Kentucky	21,240	26	North Carolina	0.55%
27	Kansas	20,887	27	Tennessee	0.53%
28	Iowa	20,617	28	Oklahoma	0.50%
29	Oklahoma	18,941	29	Kentucky	0.49%
30	Idaho	18,269	30	District of Columbia	0.49%
31	Nevada	17,450	31	Florida	0.48%
32	Alabama	17,082	32	South Carolina	0.47%
33	Connecticut	15,216	33	Michigan	0.46%
34	West Virginia	13,637	34	Wisconsin	0.45%
35	Nebraska	12,958	35	New York	0.44%
36	Arkansas	12,338	36	California	0.44%
37	Maine	10,645	37	New Jersey	0.43%
38	Louisiana	9,999	38	Connecticut	0.43%
39	Montana	9,123	39	Arkansas	0.42%
40	Mississippi	9,056	40	New Mexico	0.42%
41	Delaware	8,902	41	Minnesota	0.40%
42	New Mexico	8,693	42	Georgia	0.39%
43	New Hampshire	8,399	43	Texas	0.38%
44	Vermont	7,036	44	Illinois	0.36%
45	Wyoming	6,048	45	Alabama	0.36%
46	Alaska	5,920	46	Massachusetts	0.35%
47	South Dakota	4,905	47	Hawaii	0.33%
48	Hawaii	4,558	48	Mississippi	0.30%
49	District of Columbia	2,941	49	Rhode Island	0.24%
50	Rhode Island	2,531	50	Louisiana	0.22%
51	North Dakota	1,328	51	North Dakota	0.20%

Source: U.S. Census Bureau, 2010 American Community Survey
B04006 People Reporting Ancestry, 1 year estimates