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Delaware County Historical First Ancestry Data

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ACS 2010-2014 data

502,408 (89.59%) out of the total population of 560,775 reported first ancestry.

	Delaware County	% of the Total Population	Pennsylvania	U.S.
Arab	2,813	0.50%, see rank	0.49%	0.56%
Czech	1,500	0.27%, see rank	0.40%	0.47%
Danish	765	0.14%, see rank	0.13%	0.42%
Dutch	4,637	0.83%, see rank	1.76%	1.40%
English	45,818	8.17%, see rank	7.42%	8.02%
French	8,722	1.56%, see rank	1.87%	3.34%
German	84,488	15.07%, see rank	27.27%	15.03%
Greek	4,994	0.89%, see rank	0.50%	0.41%
Hungarian	2,230	0.40%, see rank	1.03%	0.46%
Irish	149,595	26.68%, see rank	16.97%	10.80%
Italian	97,986	17.47%, see rank	12.13%	5.52%
Norwegian	1,988	0.35%, see rank	0.33%	1.42%
Polish	24,199	4.32%, see rank	6.62%	3.01%
Portuguese	757	0.13%, see rank	0.15%	0.44%
Russian	7,805	1.39%, see rank	1.47%	0.92%
Scotch-Irish	4,585	0.82%, see rank	1.18%	0.99%
Scottish	7,731	1.38%, see rank	1.50%	1.72%
Subsaharan African	12,507	2.23%, see rank	0.74%	0.95%
Swedish	3,332	0.59%, see rank	0.82%	1.27%
Swiss	985	0.18%, see rank	0.51%	0.30%
Ukrainian	4,454	0.79%, see rank	0.88%	0.31%
American	18,057	3.22%, see rank	5.22%	7.12%
Welsh	5,581	1.00%, see rank	1.30%	0.57%

ACS 2008-2012 data

508,691 (91.02%) out of the total population of 558,874 reported first ancestry.

	Delaware County	% of the Total Population	Pennsylvania	U.S.
Arab	2,451	0.44%, see rank	0.49%	0.53%
Czech	1,543	0.28%, see rank	0.44%	0.50%
Danish	1,103	0.20%, see rank	0.14%	0.45%
Dutch	5,677	1.02%, see rank	1.94%	1.51%
English	49,614	8.88%, see rank	7.94%	8.53%
French	9,426	1.69%, see rank	1.99%	3.54%
German	86,583	15.49%, see rank	28.44%	15.79%
Greek	5,028	0.90%, see rank	0.51%	0.42%
Hungarian	2,294	0.41%, see rank	1.08%	0.48%
Irish	156,593	28.02%, see rank	17.65%	11.36%
Italian	96,582	17.28%, see rank	12.26%	5.66%
Norwegian	2,210	0.40%, see rank	0.34%	1.46%
Polish	24,348	4.36%, see rank	6.78%	3.13%
Portuguese	649	0.12%, see rank	0.15%	0.46%
Russian	7,732	1.38%, see rank	1.53%	0.97%
Scotch-Irish	5,350	0.96%, see rank	1.30%	1.07%
Scottish	7,965	1.43%, see rank	1.58%	1.81%
Subsaharan African	11,221	2.01%, see rank	0.68%	0.93%
Swedish	3,841	0.69%, see rank	0.85%	1.34%
Swiss	1,173	0.21%, see rank	0.55%	0.31%
Ukrainian	4,920	0.88%, see rank	0.91%	0.31%
American	14,915	2.67%, see rank	4.84%	6.72%
Welsh	5,864	1.05%, see rank	1.41%	0.60%

ACS 2006-2010 data

511,787 (91.97%) out of the total population of 556,468 reported first ancestry.

	Delaware County	% of the Total Population	Pennsylvania	U.S.
Arab	2,580	0.46%, see rank	0.47%	0.50%
Czech	1,410	0.25%, see rank	0.46%	0.53%
Danish	1,216	0.22%, see rank	0.15%	0.48%
Dutch	6,075	1.09%, see rank	2.13%	1.63%
English	51,960	9.34%, see rank	8.35%	9.02%
French	10,387	1.87%, see rank	2.11%	3.77%
German	90,419	16.25%, see rank	29.39%	16.51%
Greek	5,183	0.93%, see rank	0.53%	0.44%
Hungarian	2,967	0.53%, see rank	1.15%	0.51%
Irish	159,534	28.67%, see rank	17.85%	11.76%
Italian	100,906	18.13%, see rank	12.51%	5.78%
Norwegian	2,708	0.49%, see rank	0.34%	1.51%
Polish	26,263	4.72%, see rank	6.98%	3.24%
Portuguese	675	0.12%, see rank	0.15%	0.47%
Russian	7,938	1.43%, see rank	1.60%	1.01%
Scotch-Irish	9,926	1.78%, see rank	1.99%	1.72%
Scottish	9,160	1.65%, see rank	1.67%	1.92%
Subsaharan African	10,908	1.96%, see rank	0.65%	0.91%
Swedish	4,038	0.73%, see rank	0.91%	1.41%
Swiss	1,291	0.23%, see rank	0.57%	0.33%
Ukrainian	4,664	0.84%, see rank	0.94%	0.31%
American	12,133	2.18%, see rank	4.36%	6.28%
Welsh	6,317	1.14%, see rank	1.49%	0.63%

ACS 2005-2009 data

510,798 (92.03%) out of the total population of 555,018 reported first ancestry.

	Delaware County	% of the Total Population	Pennsylvania	U.S.
Arab	2,330	0.42%, see rank	0.47%	0.50%
Czech	1,320	0.24%, see rank	0.47%	0.54%
Danish	1,347	0.24%, see rank	0.16%	0.49%
Dutch	5,947	1.07%, see rank	2.21%	1.68%
English	52,225	9.41%, see rank	8.53%	9.29%
French	10,722	1.93%, see rank	2.15%	3.90%
German	93,301	16.81%, see rank	29.85%	16.89%
Greek	5,357	0.97%, see rank	0.53%	0.45%
Hungarian	3,027	0.55%, see rank	1.17%	0.52%
Irish	163,500	29.46%, see rank	18.11%	12.01%
Italian	103,021	18.56%, see rank	12.73%	5.91%
Norwegian	2,874	0.52%, see rank	0.35%	1.55%
Polish	27,444	4.94%, see rank	7.14%	3.32%
Portuguese	662	0.12%, see rank	0.15%	0.48%
Russian	7,872	1.42%, see rank	1.65%	1.04%
Scotch-Irish	10,631	1.92%, see rank	2.06%	1.77%
Scottish	10,181	1.83%, see rank	1.70%	1.97%
Subsaharan African	9,712	1.75%, see rank	0.64%	0.88%
Swedish	4,217	0.76%, see rank	0.93%	1.45%
Swiss	1,573	0.28%, see rank	0.58%	0.34%
Ukrainian	5,126	0.92%, see rank	0.98%	0.32%
American	13,391	2.41%, see rank	4.49%	6.43%
Welsh	6,290	1.13%, see rank	1.52%	0.65%

US Census 2000 data

480,349 (87.20%) out of the total population of 550,864 reported first ancestry.

	Delaware County	% of the Total Population	Pennsylvania	U.S.
Arab	1,923	0.35%, see rank	0.32%	0.36%
Czech	565	0.10%, see rank	0.17%	0.27%
Danish	579	0.11%, see rank	0.08%	0.30%
Dutch	2,383	0.43%, see rank	0.99%	0.91%
English	32,017	5.81%, see rank	4.75%	5.91%
French	5,510	1.00%, see rank	1.05%	2.39%
German	49,787	9.04%, see rank	19.14%	10.81%
Greek	4,627	0.84%, see rank	0.37%	0.34%
Hungarian	1,771	0.32%, see rank	0.66%	0.32%
Irish	118,027	21.43%, see rank	10.11%	6.85%
Italian	84,216	15.29%, see rank	9.55%	4.59%
Norwegian	1,572	0.29%, see rank	0.22%	1.15%
Polish	17,121	3.11%, see rank	4.74%	2.24%
Portuguese	508	0.09%, see rank	0.08%	0.33%
Russian	5,315	0.96%, see rank	1.04%	0.68%
Scotch-Irish	7,767	1.41%, see rank	1.29%	1.17%
Scottish	5,567	1.01%, see rank	0.93%	1.12%
Subsaharan African	5,663	1.03%, see rank	0.46%	0.61%
Swedish	2,115	0.38%, see rank	0.51%	0.87%
Swiss	613	0.11%, see rank	0.31%	0.19%
Ukrainian	3,602	0.65%, see rank	0.72%	0.24%
American	15,769	2.86%, see rank	5.16%	7.33%
Welsh	3,110	0.56%, 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.