Illinois' largest ancestry groups

German-Americans were the largest ancestry group in Illinois in 2010. Here's a look at the top 50 largest ancestries in the state:

Rank	Ancestry	Illinois Estimated Population	Percentage of Total Population
	Total:	12,843,166	100.0%
1	German	2,509,602	19.5%
2	Irish	1,598,702	12.4%
3	Polish	970,053	7.6%
4	Italian	794,985	6.2%
5	English	786,693	6.1%
6	American	613,029	4.8%
7	Swedish	281,076	2.2%
8	French (except Basque)	244,045	1.9%
9	Dutch	190,070	1.5%
10	Norwegian	165,590	1.3%
11	Scottish	142,872	1.1%
12	Czech	133,127	1.0%
13	European	130,534	1.0%
14	Russian	126,227	1.0%
15	Greek	94,513	0.7%
16	Lithuanian	89,014	0.7%
17	Scotch-Irish	79,490	0.6%
18	Hungarian	50,230	0.4%
19	Ukrainian	49,755	0.4%
20	Danish	46,584	0.4%
21	Welsh	45,902	0.4%
22	Croatian	43,323	0.3%
23	Austrian	39,060	0.3%
24	Slovak	38,999	0.3%
25	African	38,755	0.3%
26	Swiss	35,939	0.3%
27	Belgian	35,483	0.3%
28	French Canadian	35,286	0.3%
29	British	33,086	0.3%
30	Romanian	28,373	0.2%
31	Arab	26,199	0.2%
32	Eastern European	21,341	0.2%
33	Serbian	20,878	0.2%
34	Yugoslavian	20,237	0.2%
35	Bulgarian	16,955	0.1%
36	Czechoslovakian	16,890	0.1%
37	Finnish	15,786	0.1%
38	Scandinavian	15,623	0.1%
39	Assyrian/Chaldean/Syriac	15,244	0.1%
40	Canadian	15,168	0.1%
41	Lebanese	13,932	0.1%
42	Slovene	13,548	0.1%
43	Albanian	12,478	0.1%
44	Other Arab	12,226	0.1%
45	Nigerian	12,148	0.1%
46	Palestinian	11,963	0.1%
47	Iranian	11,519	0.1%
48	Jamaican	10,910	0.1%
49	Northern European	10,852	0.1%
50	Portuguese	9,794	0.1%

Source: U.S. Census Bureau, 2010 American Community Survey

B04006 People Reporting Ancestry, 1 year estimates