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San Mateo County Historical First Ancestry Data

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ACS 2010-2014 data

678,689 (91.73%) out of the total population of 739,837 reported first ancestry.

	San Mateo County	% of the Total Population	California	U.S.
Arab	10,094	1.36%, see rank	0.72%	0.56%
Czech	2,338	0.32%, see rank	0.22%	0.47%
Danish	3,548	0.48%, see rank	0.46%	0.42%
Dutch	6,384	0.86%, see rank	0.99%	1.40%
English	43,761	5.91%, see rank	5.94%	8.02%
French	15,171	2.05%, see rank	2.15%	3.34%
German	60,037	8.11%, see rank	8.51%	15.03%
Greek	5,576	0.75%, see rank	0.35%	0.41%
Hungarian	2,829	0.38%, see rank	0.32%	0.46%
Irish	58,914	7.96%, see rank	6.69%	10.80%
Italian	49,412	6.68%, see rank	3.97%	5.52%
Norwegian	7,529	1.02%, see rank	1.02%	1.42%
Polish	10,107	1.37%, see rank	1.32%	3.01%
Portuguese	5,826	0.79%, see rank	0.91%	0.44%
Russian	13,218	1.79%, see rank	1.13%	0.92%
Scotch-Irish	4,294	0.58%, see rank	0.61%	0.99%
Scottish	11,560	1.56%, see rank	1.34%	1.72%
Subsaharan African	1,943	0.26%, see rank	0.69%	0.95%
Swedish	9,137	1.24%, see rank	1.09%	1.27%
Swiss	3,232	0.44%, see rank	0.27%	0.30%
Ukrainian	2,470	0.33%, see rank	0.27%	0.31%
American	17,883	2.42%, see rank	3.22%	7.12%
Welsh	3,476	0.47%, see rank	0.43%	0.57%

ACS 2008-2012 data

678,338 (94.06%) out of the total population of 721,183 reported first ancestry.

	San Mateo County	% of the Total Population	California	U.S.
Arab	10,844	1.50%, see rank	0.70%	0.53%
Czech	1,902	0.26%, see rank	0.24%	0.50%
Danish	4,169	0.58%, see rank	0.50%	0.45%
Dutch	6,490	0.90%, see rank	1.08%	1.51%
English	47,717	6.62%, see rank	6.39%	8.53%
French	17,126	2.37%, see rank	2.28%	3.54%
German	61,440	8.52%, see rank	9.10%	15.79%
Greek	5,187	0.72%, see rank	0.35%	0.42%
Hungarian	2,926	0.41%, see rank	0.34%	0.48%
Irish	60,568	8.40%, see rank	7.13%	11.36%
Italian	49,861	6.91%, see rank	4.08%	5.66%
Norwegian	7,534	1.04%, see rank	1.06%	1.46%
Polish	10,554	1.46%, see rank	1.35%	3.13%
Portuguese	5,782	0.80%, see rank	0.96%	0.46%
Russian	13,402	1.86%, see rank	1.18%	0.97%
Scotch-Irish	4,289	0.59%, see rank	0.67%	1.07%
Scottish	11,833	1.64%, see rank	1.43%	1.81%
Subsaharan African	1,689	0.23%, see rank	0.72%	0.93%
Swedish	9,386	1.30%, see rank	1.16%	1.34%
Swiss	2,925	0.41%, see rank	0.28%	0.31%
Ukrainian	2,430	0.34%, see rank	0.26%	0.31%
American	14,826	2.06%, see rank	2.78%	6.72%
Welsh	3,206	0.44%, see rank	0.46%	0.60%

ACS 2006-2010 data

666,521 (94.63%) out of the total population of 704,327 reported first ancestry.

	San Mateo County	% of the Total Population	California	U.S.
Arab	10,806	1.53%, see rank	0.66%	0.50%
Czech	2,129	0.30%, see rank	0.26%	0.53%
Danish	4,510	0.64%, see rank	0.53%	0.48%
Dutch	6,875	0.98%, see rank	1.15%	1.63%
English	48,076	6.83%, see rank	6.77%	9.02%
French	18,712	2.66%, see rank	2.44%	3.77%
German	64,396	9.14%, see rank	9.60%	16.51%
Greek	6,042	0.86%, see rank	0.38%	0.44%
Hungarian	2,813	0.40%, see rank	0.36%	0.51%
Irish	60,636	8.61%, see rank	7.50%	11.76%
Italian	48,534	6.89%, see rank	4.21%	5.78%
Norwegian	7,172	1.02%, see rank	1.10%	1.51%
Polish	10,638	1.51%, see rank	1.41%	3.24%
Portuguese	5,842	0.83%, see rank	1.02%	0.47%
Russian	12,572	1.78%, see rank	1.22%	1.01%
Scotch-Irish	7,378	1.05%, see rank	1.19%	1.72%
Scottish	12,051	1.71%, see rank	1.54%	1.92%
Subsaharan African	2,114	0.30%, see rank	0.72%	0.91%
Swedish	9,730	1.38%, see rank	1.25%	1.41%
Swiss	2,962	0.42%, see rank	0.31%	0.33%
Ukrainian	2,376	0.34%, see rank	0.26%	0.31%
American	11,173	1.59%, see rank	2.43%	6.28%
Welsh	3,202	0.45%, see rank	0.49%	0.63%

ACS 2005-2009 data

666,448 (94.95%) out of the total population of 701,886 reported first ancestry.

	San Mateo County	% of the Total Population	California	U.S.
Arab	11,426	1.63%, see rank	0.66%	0.50%
Czech	1,986	0.28%, see rank	0.27%	0.54%
Danish	4,633	0.66%, see rank	0.55%	0.49%
Dutch	6,472	0.92%, see rank	1.19%	1.68%
English	49,423	7.04%, see rank	7.02%	9.29%
French	20,997	2.99%, see rank	2.56%	3.90%
German	64,594	9.20%, see rank	9.93%	16.89%
Greek	6,003	0.86%, see rank	0.38%	0.45%
Hungarian	2,904	0.41%, see rank	0.37%	0.52%
Irish	64,128	9.14%, see rank	7.79%	12.01%
Italian	50,785	7.24%, see rank	4.33%	5.91%
Norwegian	7,555	1.08%, see rank	1.14%	1.55%
Polish	11,224	1.60%, see rank	1.45%	3.32%
Portuguese	6,688	0.95%, see rank	1.05%	0.48%
Russian	13,128	1.87%, see rank	1.25%	1.04%
Scotch-Irish	8,590	1.22%, see rank	1.23%	1.77%
Scottish	12,610	1.80%, see rank	1.61%	1.97%
Subsaharan African	2,329	0.33%, see rank	0.71%	0.88%
Swedish	9,544	1.36%, see rank	1.28%	1.45%
Swiss	3,203	0.46%, see rank	0.32%	0.34%
Ukrainian	2,397	0.34%, see rank	0.27%	0.32%
American	11,807	1.68%, see rank	2.66%	6.43%
Welsh	3,327	0.47%, see rank	0.52%	0.65%

US Census 2000 data

625,897 (88.51%) out of the total population of 707,161 reported first ancestry.

	San Mateo County	% of the Total Population	California	U.S.
Arab	7,831	1.11%, see rank	0.50%	0.36%
Czech	923	0.13%, see rank	0.14%	0.27%
Danish	2,925	0.41%, see rank	0.38%	0.30%
Dutch	3,940	0.56%, see rank	0.71%	0.91%
English	33,375	4.72%, see rank	4.91%	5.91%
French	12,001	1.70%, see rank	1.57%	2.39%
German	44,121	6.24%, see rank	6.45%	10.81%
Greek	5,176	0.73%, see rank	0.29%	0.34%
Hungarian	2,057	0.29%, see rank	0.27%	0.32%
Irish	44,451	6.29%, see rank	4.72%	6.85%
Italian	46,616	6.59%, see rank	3.41%	4.59%
Norwegian	6,794	0.96%, see rank	0.92%	1.15%
Polish	7,437	1.05%, see rank	0.95%	2.24%
Portuguese	4,387	0.62%, see rank	0.75%	0.33%
Russian	10,010	1.42%, see rank	0.90%	0.68%
Scotch-Irish	5,922	0.84%, see rank	0.87%	1.17%
Scottish	8,037	1.14%, see rank	1.00%	1.12%
Subsaharan African	2,415	0.34%, see rank	0.51%	0.61%
Swedish	6,846	0.97%, see rank	0.86%	0.87%
Swiss	2,422	0.34%, see rank	0.21%	0.19%
Ukrainian	1,980	0.28%, see rank	0.20%	0.24%
American	16,101	2.28%, see rank	3.37%	7.33%
Welsh	1,710	0.24%, see rank	0.27%	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.