Barack Obama carried Illinois D+25.1.

Barack Obama (D) vs John McCain (R) in Illinois, 2008. The state ran 17.9 points more Democratic than the nation (D+7.3 nationally). A US Senate contest shared the 2008 ballot here.

Nominees: Barack Obama (D) · John McCain (R)

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Illinois result

5,522,371 votes counted

Obama (D)

3,419,348

61.9%

McCain (R)

2,031,179

36.8%

All others

71,844

1.3%

Margin

D+25.1

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2008 presidential election

Illinois, 2008

ObamaD+25.1

How it voted

Share of the 2008 vote

Barack Obama ✓Democratic	61.9%	3,419,348
John McCainRepublican	36.8%	2,031,179
OtherAll other candidates	1.3%	71,844

D+60

R+60

102 counties, each filled by 2008 D-vs-R margin. Hover any county for its result.

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Illinois's presidential margins

1892–2024, the 2008 contest in context

Illinois's presidential margins

Year	Margin (D minus R)
1892	+3.1%
1896	−13.0%
1900	−8.4%
1904	−28.3%
1908	−15.5%
1912	+13.2%
1916	−9.2%
1920	−42.3%
1924	−35.5%
1928	−14.7%
1932	+13.2%
1936	+18.0%
1940	+2.4%
1944	+3.5%
1948	+0.8%
1952	−9.9%
1956	−19.2%
1960	+0.2%
1964	+18.9%
1968	−2.9%
1972	−18.5%
1976	−2.0%
1980	−7.9%
1984	−12.9%
1988	−2.1%
1992	+14.2%
1996	+17.5%
2000	+12.0%
2004	+10.3%
2008	+25.1%
2012	+16.8%
2016	+16.9%
2020	+16.9%
2024	+10.9%

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County results — 2008

102 counties; every row links to the county's full page.

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County	Won	Margin	Democratic	Republican	Total
Adams County	R	−22.4%	11,794	18,711	30,823
Alexander County	D	+12.6%	2,189	1,692	3,937
Bond County	R	−1.3%	3,843	3,947	7,924
Boone County	D	+4.2%	11,333	10,403	22,157
Brown County	R	−21.7%	986	1,544	2,569
Bureau County	D	+5.7%	8,889	7,911	17,113
Calhoun County	D	+7.5%	1,423	1,221	2,699
Carroll County	D	+4.8%	3,965	3,596	7,674
Cass County	D	+1.3%	2,690	2,617	5,408
Champaign County	D	+17.5%	48,597	33,871	84,143
Christian County	R	−6.3%	6,918	7,872	15,100
Clark County	R	−8.0%	3,742	4,409	8,288
Clay County	R	−23.3%	2,425	3,926	6,454
Clinton County	R	−9.8%	7,657	9,357	17,314
Coles County	D	+3.2%	11,716	10,978	23,076
Cook County	D	+53.4%	1,629,024	487,736	2,137,466
Crawford County	R	−13.0%	3,883	5,070	9,129
Cumberland County	R	−20.7%	2,055	3,156	5,321
De Witt County	R	−13.3%	3,308	4,348	7,801
DeKalb County	D	+16.8%	25,784	18,266	44,818
Douglas County	R	−21.3%	3,228	5,005	8,356
DuPage County	D	+10.8%	228,698	183,626	417,973
Edgar County	R	−7.9%	3,743	4,398	8,255
Edwards County	R	−29.8%	1,140	2,137	3,350
Effingham County	R	−36.0%	5,262	11,323	16,835
Fayette County	R	−15.8%	3,967	5,499	9,680
Ford County	R	−29.0%	2,227	4,079	6,386
Franklin County	R	−2.8%	8,880	9,404	18,641
Fulton County	D	+21.3%	9,732	6,251	16,323
Gallatin County	D	+13.1%	1,587	1,212	2,859
Greene County	R	−7.5%	2,619	3,053	5,807
Grundy County	D	+1.7%	11,063	10,687	22,171
Hamilton County	R	−13.1%	1,796	2,353	4,264
Hancock County	R	−10.8%	4,141	5,161	9,469
Hardin County	R	−19.4%	892	1,330	2,255
Henderson County	D	+17.7%	2,215	1,541	3,814
Henry County	D	+7.7%	13,181	11,263	24,785
Iroquois County	R	−29.8%	4,643	8,695	13,596
Jackson County	D	+21.8%	15,248	9,687	25,532
Jasper County	R	−17.6%	2,063	2,964	5,131
Jefferson County	R	−10.7%	7,462	9,302	17,141
Jersey County	R	−2.7%	5,042	5,329	10,583
Jo Daviess County	D	+10.5%	6,403	5,170	11,750
Johnson County	R	−34.6%	1,871	3,912	5,901
Kane County	D	+11.8%	106,756	83,963	193,299
Kankakee County	D	+4.6%	24,750	22,527	48,016
Kendall County	D	+7.2%	24,742	21,380	46,631
Knox County	D	+19.9%	14,191	9,419	23,988
Lake County	D	+19.6%	177,242	118,545	299,105
LaSalle County	D	+11.1%	27,443	21,872	50,185
Lawrence County	R	−5.9%	3,016	3,403	6,536
Lee County	R	−3.0%	7,765	8,258	16,318
Livingston County	R	−19.2%	6,189	9,191	15,625
Logan County	R	−16.9%	5,250	7,429	12,896
Macon County	D	+1.1%	25,487	24,948	51,216
Macoupin County	D	+9.8%	12,090	9,891	22,373
Madison County	D	+9.2%	68,979	57,177	128,334
Marion County	R	−2.0%	8,345	8,691	17,364
Marshall County	R	−1.0%	3,081	3,145	6,333
Mason County	D	+5.9%	3,542	3,141	6,808
Massac County	R	−23.4%	2,693	4,371	7,186
McDonough County	D	+5.6%	6,783	6,055	13,042
McHenry County	D	+5.3%	72,288	64,845	139,268
McLean County	D	+1.2%	37,689	36,767	75,750
Menard County	R	−14.9%	2,706	3,672	6,464
Mercer County	D	+11.9%	4,887	3,833	8,848
Monroe County	R	−10.7%	7,953	9,881	18,083
Montgomery County	D	+2.6%	6,491	6,150	12,871
Morgan County	R	−0.8%	7,467	7,591	15,353
Moultrie County	R	−12.8%	2,668	3,471	6,260
Ogle County	R	−7.6%	11,253	13,144	24,850
Peoria County	D	+13.9%	45,906	34,579	81,704
Perry County	R	−3.9%	4,701	5,086	9,995
Piatt County	R	−12.6%	3,859	4,991	8,999
Pike County	R	−18.8%	3,024	4,457	7,616
Pope County	R	−22.3%	845	1,343	2,231
Pulaski County	D	+1.4%	1,638	1,593	3,270
Putnam County	D	+15.6%	1,900	1,378	3,337
Randolph County	R	−0.9%	7,395	7,538	15,202
Richland County	R	−15.0%	3,181	4,329	7,650
Rock Island County	D	+24.6%	42,210	25,364	68,401
Saline County	R	−8.9%	5,083	6,099	11,428
Sangamon County	D	+4.4%	51,300	46,945	99,828
Schuyler County	D	+1.8%	1,900	1,833	3,823
Scott County	R	−14.0%	1,090	1,455	2,600
Shelby County	R	−19.8%	4,245	6,396	10,868
St. Clair County	D	+22.4%	76,160	47,958	125,744
Stark County	R	−5.4%	1,357	1,513	2,907
Stephenson County	D	+6.7%	11,349	9,909	21,605
Tazewell County	R	−6.0%	29,384	33,247	63,854
Union County	R	−11.9%	3,918	5,003	9,116
Vermilion County	D	+0.6%	16,246	16,054	32,872
Wabash County	R	−13.7%	2,462	3,254	5,782
Warren County	D	+8.1%	4,286	3,637	8,029
Washington County	R	−14.3%	3,342	4,473	7,932
Wayne County	R	−35.2%	2,547	5,390	8,071
White County	R	−9.0%	3,315	3,987	7,453
Whiteside County	D	+17.6%	15,607	10,883	26,906
Will County	D	+13.2%	160,406	122,597	286,420
Williamson County	R	−14.8%	12,589	17,039	30,141
Winnebago County	D	+12.8%	70,034	53,886	126,031
Woodford County	R	−26.6%	6,999	12,191	19,483