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Chester County Historical First Ancestry Data

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ACS 2010-2014 data

458,281 (90.49%) out of the total population of 506,422 reported first ancestry.

	Chester County	% of the Total Population	Pennsylvania	U.S.
Arab	1,584	0.31%, see rank	0.49%	0.56%
Czech	1,879	0.37%, see rank	0.40%	0.47%
Danish	1,017	0.20%, see rank	0.13%	0.42%
Dutch	9,523	1.88%, see rank	1.76%	1.40%
English	61,042	12.05%, see rank	7.42%	8.02%
French	13,257	2.62%, see rank	1.87%	3.34%
German	117,455	23.19%, see rank	27.27%	15.03%
Greek	3,614	0.71%, see rank	0.50%	0.41%
Hungarian	4,429	0.87%, see rank	1.03%	0.46%
Irish	120,040	23.70%, see rank	16.97%	10.80%
Italian	76,464	15.10%, see rank	12.13%	5.52%
Norwegian	3,423	0.68%, see rank	0.33%	1.42%
Polish	25,662	5.07%, see rank	6.62%	3.01%
Portuguese	698	0.14%, see rank	0.15%	0.44%
Russian	7,343	1.45%, see rank	1.47%	0.92%
Scotch-Irish	6,335	1.25%, see rank	1.18%	0.99%
Scottish	10,860	2.14%, see rank	1.50%	1.72%
Subsaharan African	1,659	0.33%, see rank	0.74%	0.95%
Swedish	4,978	0.98%, see rank	0.82%	1.27%
Swiss	2,176	0.43%, see rank	0.51%	0.30%
Ukrainian	4,642	0.92%, see rank	0.88%	0.31%
American	23,257	4.59%, see rank	5.22%	7.12%
Welsh	7,781	1.54%, see rank	1.30%	0.57%

ACS 2008-2012 data

459,880 (92.06%) out of the total population of 499,548 reported first ancestry.

	Chester County	% of the Total Population	Pennsylvania	U.S.
Arab	2,116	0.42%, see rank	0.49%	0.53%
Czech	2,160	0.43%, see rank	0.44%	0.50%
Danish	1,241	0.25%, see rank	0.14%	0.45%
Dutch	9,350	1.87%, see rank	1.94%	1.51%
English	65,075	13.03%, see rank	7.94%	8.53%
French	14,004	2.80%, see rank	1.99%	3.54%
German	120,248	24.07%, see rank	28.44%	15.79%
Greek	3,485	0.70%, see rank	0.51%	0.42%
Hungarian	4,392	0.88%, see rank	1.08%	0.48%
Irish	121,129	24.25%, see rank	17.65%	11.36%
Italian	77,795	15.57%, see rank	12.26%	5.66%
Norwegian	3,506	0.70%, see rank	0.34%	1.46%
Polish	25,393	5.08%, see rank	6.78%	3.13%
Portuguese	736	0.15%, see rank	0.15%	0.46%
Russian	7,841	1.57%, see rank	1.53%	0.97%
Scotch-Irish	7,062	1.41%, see rank	1.30%	1.07%
Scottish	12,501	2.50%, see rank	1.58%	1.81%
Subsaharan African	1,671	0.33%, see rank	0.68%	0.93%
Swedish	4,839	0.97%, see rank	0.85%	1.34%
Swiss	2,396	0.48%, see rank	0.55%	0.31%
Ukrainian	4,159	0.83%, see rank	0.91%	0.31%
American	21,983	4.40%, see rank	4.84%	6.72%
Welsh	8,203	1.64%, see rank	1.41%	0.60%

ACS 2006-2010 data

456,041 (92.96%) out of the total population of 490,571 reported first ancestry.

	Chester County	% of the Total Population	Pennsylvania	U.S.
Arab	1,783	0.36%, see rank	0.47%	0.50%
Czech	2,013	0.41%, see rank	0.46%	0.53%
Danish	1,228	0.25%, see rank	0.15%	0.48%
Dutch	9,185	1.87%, see rank	2.13%	1.63%
English	67,172	13.69%, see rank	8.35%	9.02%
French	14,643	2.98%, see rank	2.11%	3.77%
German	119,974	24.46%, see rank	29.39%	16.51%
Greek	3,768	0.77%, see rank	0.53%	0.44%
Hungarian	4,146	0.85%, see rank	1.15%	0.51%
Irish	119,155	24.29%, see rank	17.85%	11.76%
Italian	76,621	15.62%, see rank	12.51%	5.78%
Norwegian	3,474	0.71%, see rank	0.34%	1.51%
Polish	26,173	5.34%, see rank	6.98%	3.24%
Portuguese	751	0.15%, see rank	0.15%	0.47%
Russian	8,193	1.67%, see rank	1.60%	1.01%
Scotch-Irish	12,559	2.56%, see rank	1.99%	1.72%
Scottish	13,498	2.75%, see rank	1.67%	1.92%
Subsaharan African	1,759	0.36%, see rank	0.65%	0.91%
Swedish	5,046	1.03%, see rank	0.91%	1.41%
Swiss	2,750	0.56%, see rank	0.57%	0.33%
Ukrainian	4,651	0.95%, see rank	0.94%	0.31%
American	22,106	4.51%, see rank	4.36%	6.28%
Welsh	8,539	1.74%, see rank	1.49%	0.63%

ACS 2005-2009 data

454,374 (93.43%) out of the total population of 486,301 reported first ancestry.

	Chester County	% of the Total Population	Pennsylvania	U.S.
Arab	2,124	0.44%, see rank	0.47%	0.50%
Czech	2,259	0.46%, see rank	0.47%	0.54%
Danish	1,366	0.28%, see rank	0.16%	0.49%
Dutch	9,344	1.92%, see rank	2.21%	1.68%
English	68,115	14.01%, see rank	8.53%	9.29%
French	14,781	3.04%, see rank	2.15%	3.90%
German	121,488	24.98%, see rank	29.85%	16.89%
Greek	3,291	0.68%, see rank	0.53%	0.45%
Hungarian	4,298	0.88%, see rank	1.17%	0.52%
Irish	118,619	24.39%, see rank	18.11%	12.01%
Italian	77,321	15.90%, see rank	12.73%	5.91%
Norwegian	3,757	0.77%, see rank	0.35%	1.55%
Polish	26,445	5.44%, see rank	7.14%	3.32%
Portuguese	572	0.12%, see rank	0.15%	0.48%
Russian	8,125	1.67%, see rank	1.65%	1.04%
Scotch-Irish	12,531	2.58%, see rank	2.06%	1.77%
Scottish	14,385	2.96%, see rank	1.70%	1.97%
Subsaharan African	1,595	0.33%, see rank	0.64%	0.88%
Swedish	5,557	1.14%, see rank	0.93%	1.45%
Swiss	3,029	0.62%, see rank	0.58%	0.34%
Ukrainian	4,470	0.92%, see rank	0.98%	0.32%
American	22,995	4.73%, see rank	4.49%	6.43%
Welsh	8,544	1.76%, see rank	1.52%	0.65%

US Census 2000 data

370,717 (85.52%) out of the total population of 433,501 reported first ancestry.

	Chester County	% of the Total Population	Pennsylvania	U.S.
Arab	1,331	0.31%, see rank	0.32%	0.36%
Czech	714	0.16%, see rank	0.17%	0.27%
Danish	767	0.18%, see rank	0.08%	0.30%
Dutch	4,288	0.99%, see rank	0.99%	0.91%
English	37,340	8.61%, see rank	4.75%	5.91%
French	6,548	1.51%, see rank	1.05%	2.39%
German	66,652	15.38%, see rank	19.14%	10.81%
Greek	2,315	0.53%, see rank	0.37%	0.34%
Hungarian	2,384	0.55%, see rank	0.66%	0.32%
Irish	66,572	15.36%, see rank	10.11%	6.85%
Italian	48,662	11.23%, see rank	9.55%	4.59%
Norwegian	2,029	0.47%, see rank	0.22%	1.15%
Polish	14,280	3.29%, see rank	4.74%	2.24%
Portuguese	225	0.05%, see rank	0.08%	0.33%
Russian	3,929	0.91%, see rank	1.04%	0.68%
Scotch-Irish	7,364	1.70%, see rank	1.29%	1.17%
Scottish	7,249	1.67%, see rank	0.93%	1.12%
Subsaharan African	1,919	0.44%, see rank	0.46%	0.61%
Swedish	2,830	0.65%, see rank	0.51%	0.87%
Swiss	1,451	0.33%, see rank	0.31%	0.19%
Ukrainian	3,085	0.71%, see rank	0.72%	0.24%
American	20,839	4.81%, see rank	5.16%	7.33%
Welsh	3,729	0.86%, see rank	0.72%	0.31%

* ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.