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Dekalb County Historical First Ancestry Data

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ACS 2010-2014 data

88,888 (84.72%) out of the total population of 104,919 reported first ancestry.

	Dekalb County	% of the Total Population	Illinois	U.S.
Arab	251	0.24%, see rank	0.71%	0.56%
Czech	916	0.87%, see rank	0.92%	0.47%
Danish	788	0.75%, see rank	0.38%	0.42%
Dutch	1,761	1.68%, see rank	1.37%	1.40%
English	8,029	7.65%, see rank	5.90%	8.02%
French	2,826	2.69%, see rank	2.13%	3.34%
German	31,791	30.30%, see rank	19.07%	15.03%
Greek	609	0.58%, see rank	0.76%	0.41%
Hungarian	404	0.39%, see rank	0.40%	0.46%
Irish	16,629	15.85%, see rank	12.00%	10.80%
Italian	7,373	7.03%, see rank	6.14%	5.52%
Norwegian	5,140	4.90%, see rank	1.25%	1.42%
Polish	7,031	6.70%, see rank	7.22%	3.01%
Portuguese	52	0.05%, see rank	0.08%	0.44%
Russian	501	0.48%, see rank	0.97%	0.92%
Scotch-Irish	915	0.87%, see rank	0.59%	0.99%
Scottish	1,730	1.65%, see rank	1.16%	1.72%
Subsaharan African	695	0.66%, see rank	0.64%	0.95%
Swedish	5,353	5.10%, see rank	2.13%	1.27%
Swiss	186	0.18%, see rank	0.27%	0.30%
Ukrainian	172	0.16%, see rank	0.40%	0.31%
American	4,788	4.56%, see rank	5.00%	7.12%
Welsh	741	0.71%, see rank	0.37%	0.57%

ACS 2008-2012 data

90,343 (86.19%) out of the total population of 104,820 reported first ancestry.

	Dekalb County	% of the Total Population	Illinois	U.S.
Arab	309	0.29%, see rank	0.64%	0.53%
Czech	1,053	1.00%, see rank	0.96%	0.50%
Danish	1,081	1.03%, see rank	0.40%	0.45%
Dutch	1,661	1.58%, see rank	1.46%	1.51%
English	8,507	8.12%, see rank	6.23%	8.53%
French	2,879	2.75%, see rank	2.26%	3.54%
German	32,645	31.14%, see rank	19.89%	15.79%
Greek	934	0.89%, see rank	0.78%	0.42%
Hungarian	311	0.30%, see rank	0.41%	0.48%
Irish	17,492	16.69%, see rank	12.52%	11.36%
Italian	7,069	6.74%, see rank	6.29%	5.66%
Norwegian	4,935	4.71%, see rank	1.30%	1.46%
Polish	7,308	6.97%, see rank	7.47%	3.13%
Portuguese	100	0.10%, see rank	0.08%	0.46%
Russian	978	0.93%, see rank	1.03%	0.97%
Scotch-Irish	805	0.77%, see rank	0.65%	1.07%
Scottish	1,624	1.55%, see rank	1.20%	1.81%
Subsaharan African	519	0.50%, see rank	0.62%	0.93%
Swedish	5,787	5.52%, see rank	2.24%	1.34%
Swiss	324	0.31%, see rank	0.29%	0.31%
Ukrainian	300	0.29%, see rank	0.40%	0.31%
American	5,037	4.81%, see rank	4.85%	6.72%
Welsh	744	0.71%, see rank	0.40%	0.60%

ACS 2006-2010 data

91,439 (87.90%) out of the total population of 104,026 reported first ancestry.

	Dekalb County	% of the Total Population	Illinois	U.S.
Arab	282	0.27%, see rank	0.55%	0.50%
Czech	1,188	1.14%, see rank	1.01%	0.53%
Danish	980	0.94%, see rank	0.42%	0.48%
Dutch	1,919	1.84%, see rank	1.58%	1.63%
English	9,032	8.68%, see rank	6.56%	9.02%
French	3,400	3.27%, see rank	2.43%	3.77%
German	33,997	32.68%, see rank	20.72%	16.51%
Greek	837	0.80%, see rank	0.83%	0.44%
Hungarian	404	0.39%, see rank	0.43%	0.51%
Irish	18,210	17.51%, see rank	12.94%	11.76%
Italian	6,685	6.43%, see rank	6.35%	5.78%
Norwegian	4,915	4.72%, see rank	1.36%	1.51%
Polish	7,317	7.03%, see rank	7.69%	3.24%
Portuguese	95	0.09%, see rank	0.08%	0.47%
Russian	841	0.81%, see rank	1.07%	1.01%
Scotch-Irish	1,532	1.47%, see rank	1.12%	1.72%
Scottish	1,689	1.62%, see rank	1.26%	1.92%
Subsaharan African	326	0.31%, see rank	0.63%	0.91%
Swedish	6,563	6.31%, see rank	2.37%	1.41%
Swiss	379	0.36%, see rank	0.33%	0.33%
Ukrainian	354	0.34%, see rank	0.40%	0.31%
American	3,947	3.79%, see rank	4.61%	6.28%
Welsh	539	0.52%, see rank	0.41%	0.63%

ACS 2005-2009 data

91,589 (87.83%) out of the total population of 104,279 reported first ancestry.

	Dekalb County	% of the Total Population	Illinois	U.S.
Arab	166	0.16%, see rank	0.52%	0.50%
Czech	1,010	0.97%, see rank	1.02%	0.54%
Danish	899	0.86%, see rank	0.44%	0.49%
Dutch	1,910	1.83%, see rank	1.61%	1.68%
English	9,173	8.80%, see rank	6.71%	9.29%
French	3,659	3.51%, see rank	2.51%	3.90%
German	34,219	32.81%, see rank	21.16%	16.89%
Greek	850	0.82%, see rank	0.85%	0.45%
Hungarian	478	0.46%, see rank	0.45%	0.52%
Irish	18,148	17.40%, see rank	13.14%	12.01%
Italian	7,012	6.72%, see rank	6.45%	5.91%
Norwegian	4,941	4.74%, see rank	1.38%	1.55%
Polish	7,156	6.86%, see rank	7.85%	3.32%
Portuguese	131	0.13%, see rank	0.07%	0.48%
Russian	1,008	0.97%, see rank	1.11%	1.04%
Scotch-Irish	1,515	1.45%, see rank	1.15%	1.77%
Scottish	1,666	1.60%, see rank	1.31%	1.97%
Subsaharan African	380	0.36%, see rank	0.62%	0.88%
Swedish	6,672	6.40%, see rank	2.46%	1.45%
Swiss	345	0.33%, see rank	0.33%	0.34%
Ukrainian	392	0.38%, see rank	0.40%	0.32%
American	3,883	3.72%, see rank	4.55%	6.43%
Welsh	619	0.59%, see rank	0.42%	0.65%

US Census 2000 data

71,051 (79.86%) out of the total population of 88,969 reported first ancestry.

	Dekalb County	% of the Total Population	Illinois	U.S.
Arab	223	0.25%, see rank	0.38%	0.36%
Czech	501	0.56%, see rank	0.57%	0.27%
Danish	347	0.39%, see rank	0.26%	0.30%
Dutch	787	0.88%, see rank	0.90%	0.91%
English	5,109	5.74%, see rank	4.12%	5.91%
French	1,629	1.83%, see rank	1.34%	2.39%
German	18,224	20.48%, see rank	13.82%	10.81%
Greek	515	0.58%, see rank	0.65%	0.34%
Hungarian	241	0.27%, see rank	0.27%	0.32%
Irish	7,647	8.60%, see rank	7.62%	6.85%
Italian	3,424	3.85%, see rank	4.81%	4.59%
Norwegian	3,578	4.02%, see rank	0.96%	1.15%
Polish	3,173	3.57%, see rank	5.68%	2.24%
Portuguese	48	0.05%, see rank	0.04%	0.33%
Russian	276	0.31%, see rank	0.72%	0.68%
Scotch-Irish	753	0.85%, see rank	0.73%	1.17%
Scottish	796	0.89%, see rank	0.73%	1.12%
Subsaharan African	429	0.48%, see rank	0.57%	0.61%
Swedish	3,347	3.76%, see rank	1.52%	0.87%
Swiss	244	0.27%, see rank	0.17%	0.19%
Ukrainian	105	0.12%, see rank	0.30%	0.24%
American	4,216	4.74%, see rank	4.58%	7.33%
Welsh	284	0.32%, 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.