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Oak Brook, IL Historical First Ancestry Data

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ACS 2010-2014 data

6,971 (87.50%) out of the total population of 7,967 reported first ancestry.

	Oak Brook, IL	% of the Total Population	Illinois	U.S.
Arab	107	1.34%, see rank	0.71%	0.56%
Czech	134	1.68%, see rank	0.92%	0.47%
Danish	155	1.95%, see rank	0.38%	0.42%
Dutch	66	0.83%, see rank	1.37%	1.40%
English	520	6.53%, see rank	5.90%	8.02%
French	128	1.61%, see rank	2.13%	3.34%
German	1,117	14.02%, see rank	19.07%	15.03%
Greek	261	3.28%, see rank	0.76%	0.41%
Hungarian	28	0.35%, see rank	0.40%	0.46%
Irish	894	11.22%, see rank	12.00%	10.80%
Italian	994	12.48%, see rank	6.14%	5.52%
Norwegian	39	0.49%, see rank	1.25%	1.42%
Polish	417	5.23%, see rank	7.22%	3.01%
Portuguese	0	0.00%, see rank	0.08%	0.44%
Russian	66	0.83%, see rank	0.97%	0.92%
Scotch-Irish	26	0.33%, see rank	0.59%	0.99%
Scottish	96	1.20%, see rank	1.16%	1.72%
Subsaharan African	0	0.00%, see rank	0.64%	0.95%
Swedish	164	2.06%, see rank	2.13%	1.27%
Swiss	7	0.09%, see rank	0.27%	0.30%
Ukrainian	45	0.56%, see rank	0.40%	0.31%
American	212	2.66%, see rank	5.00%	7.12%
Welsh	13	0.16%, see rank	0.37%	0.57%

ACS 2008-2012 data

7,589 (96.00%) out of the total population of 7,905 reported first ancestry.

	Oak Brook, IL	% of the Total Population	Illinois	U.S.
Arab	224	2.83%, see rank	0.64%	0.53%
Czech	174	2.20%, see rank	0.96%	0.50%
Danish	160	2.02%, see rank	0.40%	0.45%
Dutch	150	1.90%, see rank	1.46%	1.51%
English	587	7.43%, see rank	6.23%	8.53%
French	182	2.30%, see rank	2.26%	3.54%
German	1,076	13.61%, see rank	19.89%	15.79%
Greek	218	2.76%, see rank	0.78%	0.42%
Hungarian	41	0.52%, see rank	0.41%	0.48%
Irish	769	9.73%, see rank	12.52%	11.36%
Italian	1,406	17.79%, see rank	6.29%	5.66%
Norwegian	134	1.70%, see rank	1.30%	1.46%
Polish	445	5.63%, see rank	7.47%	3.13%
Portuguese	0	0.00%, see rank	0.08%	0.46%
Russian	101	1.28%, see rank	1.03%	0.97%
Scotch-Irish	17	0.22%, see rank	0.65%	1.07%
Scottish	120	1.52%, see rank	1.20%	1.81%
Subsaharan African	0	0.00%, see rank	0.62%	0.93%
Swedish	160	2.02%, see rank	2.24%	1.34%
Swiss	55	0.70%, see rank	0.29%	0.31%
Ukrainian	107	1.35%, see rank	0.40%	0.31%
American	85	1.08%, see rank	4.85%	6.72%
Welsh	13	0.16%, see rank	0.40%	0.60%

ACS 2006-2010 data

7,651 (96.79%) out of the total population of 7,905 reported first ancestry.

	Oak Brook, IL	% of the Total Population	Illinois	U.S.
Arab	126	1.59%, see rank	0.55%	0.50%
Czech	213	2.69%, see rank	1.01%	0.53%
Danish	113	1.43%, see rank	0.42%	0.48%
Dutch	232	2.93%, see rank	1.58%	1.63%
English	462	5.84%, see rank	6.56%	9.02%
French	267	3.38%, see rank	2.43%	3.77%
German	1,267	16.03%, see rank	20.72%	16.51%
Greek	321	4.06%, see rank	0.83%	0.44%
Hungarian	32	0.40%, see rank	0.43%	0.51%
Irish	836	10.58%, see rank	12.94%	11.76%
Italian	1,237	15.65%, see rank	6.35%	5.78%
Norwegian	97	1.23%, see rank	1.36%	1.51%
Polish	533	6.74%, see rank	7.69%	3.24%
Portuguese	0	0.00%, see rank	0.08%	0.47%
Russian	72	0.91%, see rank	1.07%	1.01%
Scotch-Irish	58	0.73%, see rank	1.12%	1.72%
Scottish	130	1.64%, see rank	1.26%	1.92%
Subsaharan African	79	1.00%, see rank	0.63%	0.91%
Swedish	142	1.80%, see rank	2.37%	1.41%
Swiss	55	0.70%, see rank	0.33%	0.33%
Ukrainian	80	1.01%, see rank	0.40%	0.31%
American	103	1.30%, see rank	4.61%	6.28%
Welsh	45	0.57%, see rank	0.41%	0.63%

ACS 2005-2009 data

8,410 (96.40%) out of the total population of 8,724 reported first ancestry.

	Oak Brook, IL	% of the Total Population	Illinois	U.S.
Arab	227	2.60%, see rank	0.52%	0.50%
Czech	235	2.69%, see rank	1.02%	0.54%
Danish	77	0.88%, see rank	0.44%	0.49%
Dutch	241	2.76%, see rank	1.61%	1.68%
English	621	7.12%, see rank	6.71%	9.29%
French	219	2.51%, see rank	2.51%	3.90%
German	1,438	16.48%, see rank	21.16%	16.89%
Greek	512	5.87%, see rank	0.85%	0.45%
Hungarian	24	0.28%, see rank	0.45%	0.52%
Irish	1,086	12.45%, see rank	13.14%	12.01%
Italian	1,412	16.19%, see rank	6.45%	5.91%
Norwegian	119	1.36%, see rank	1.38%	1.55%
Polish	578	6.63%, see rank	7.85%	3.32%
Portuguese	0	0.00%, see rank	0.07%	0.48%
Russian	90	1.03%, see rank	1.11%	1.04%
Scotch-Irish	73	0.84%, see rank	1.15%	1.77%
Scottish	148	1.70%, see rank	1.31%	1.97%
Subsaharan African	101	1.16%, see rank	0.62%	0.88%
Swedish	227	2.60%, see rank	2.46%	1.45%
Swiss	73	0.84%, see rank	0.33%	0.34%
Ukrainian	100	1.15%, see rank	0.40%	0.32%
American	74	0.85%, see rank	4.55%	6.43%
Welsh	37	0.42%, see rank	0.42%	0.65%

US Census 2000 data

7,542 (86.67%) out of the total population of 8,702 reported first ancestry.

	Oak Brook, IL	% of the Total Population	Illinois	U.S.
Arab	284	3.26%, see rank	0.38%	0.36%
Czech	121	1.39%, see rank	0.57%	0.27%
Danish	40	0.46%, see rank	0.26%	0.30%
Dutch	63	0.72%, see rank	0.90%	0.91%
English	208	2.39%, see rank	4.12%	5.91%
French	96	1.10%, see rank	1.34%	2.39%
German	1,026	11.79%, see rank	13.82%	10.81%
Greek	354	4.07%, see rank	0.65%	0.34%
Hungarian	38	0.44%, see rank	0.27%	0.32%
Irish	731	8.40%, see rank	7.62%	6.85%
Italian	970	11.15%, see rank	4.81%	4.59%
Norwegian	29	0.33%, see rank	0.96%	1.15%
Polish	342	3.93%, see rank	5.68%	2.24%
Portuguese	0	0.00%, see rank	0.04%	0.33%
Russian	68	0.78%, see rank	0.72%	0.68%
Scotch-Irish	70	0.80%, see rank	0.73%	1.17%
Scottish	90	1.03%, see rank	0.73%	1.12%
Subsaharan African	0	0.00%, see rank	0.57%	0.61%
Swedish	177	2.03%, see rank	1.52%	0.87%
Swiss	0	0.00%, see rank	0.17%	0.19%
Ukrainian	46	0.53%, see rank	0.30%	0.24%
American	176	2.02%, see rank	4.58%	7.33%
Welsh	6	0.07%, see rank	0.20%	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.