Illinois — 1978 U.S. Senate election
Recent presidential results
state1978 Senate electionIllinois · U.S. SenatePereyR+7.9
How it voted
Share of the 1978 vote
| Charles H. Perey ✓Republican | 53.3% | 1,698,711 |
|---|---|---|
| Alex SmithDemocrat | 45.5% | 1,448,187 |
| Bruce Lee GreenLibertarian | 0.5% | 16,320 |
1978Senate margin
D+60R+60
102 counties, each filled by 1978 D-vs-R margin. Hover any county for its result.
County-level results (102 counties) — table
| County | Winner | Margin |
|---|---|---|
| ADAMS, IL | Republican | R+3.2 |
| ALEXANDER, IL | Democratic | D+17.3 |
| BOND, IL | Democratic | D+0.1 |
| BOONE, IL | Republican | R+14.7 |
| BROWN, IL | Democratic | D+15.2 |
| BUREAU, IL | Republican | R+10.0 |
| CALHOUN, IL | Democratic | D+5.1 |
| CARROLL, IL | Republican | R+13.9 |
| CASS, IL | Democratic | D+7.4 |
| CHAMPAIGN, IL | Republican | R+34.5 |
| CHRISTIAN, IL | Democratic | D+19.4 |
| CLARK, IL | Republican | R+3.8 |
| CLAY, IL | Republican | R+2.3 |
| CLINTON, IL | Democratic | D+9.4 |
| COLES, IL | Democratic | D+1.6 |
| COOK, IL | Republican | R+4.7 |
| CRAWFORD, IL | Republican | R+19.3 |
| CUMBERLAND, IL | Democratic | D+6.6 |
| DE WITT, IL | Republican | R+8.8 |
| DEKALB, IL | Republican | R+35.9 |
| DOUGLAS, IL | Republican | R+2.9 |
| DU PAGE, IL | Republican | R+39.2 |
| EDGAR, IL | Republican | R+9.0 |
| EDWARDS, IL | Republican | R+23.7 |
| EFFINGHAM, IL | Democratic | D+8.5 |
| FAYETTE, IL | Democratic | D+10.3 |
| FORD, IL | Republican | R+20.4 |
| FRANKLIN, IL | Democratic | D+18.2 |
| FULTON, IL | Republican | R+2.3 |
| GALLATIN, IL | Democratic | D+11.2 |
| GREENE, IL | Democratic | D+1.5 |
| GRUNDY, IL | Republican | R+9.8 |
| HAMILTON, IL | Democratic | D+5.4 |
| HANCOCK, IL | Republican | R+7.0 |
| HARDIN, IL | Democratic | D+6.1 |
| HENDERSON, IL | Republican | R+2.5 |
| HENRY, IL | Republican | R+14.0 |
| IROQUOIS, IL | Republican | R+11.8 |
| JACKSON, IL | Republican | R+14.2 |
| JASPER, IL | Democratic | D+10.8 |
| JEFFERSON, IL | Democratic | D+2.9 |
| JERSEY, IL | Democratic | D+2.0 |
| JO DAVIESS, IL | Republican | R+17.7 |
| JOHNSON, IL | Democratic | D+1.2 |
| KANE, IL | Republican | R+20.5 |
| KANKAKEE, IL | Republican | R+11.0 |
| KENDALL, IL | Republican | R+14.8 |
| KNOX, IL | Republican | R+9.7 |
| LA SALLE, IL | Republican | R+3.8 |
| LAKE, IL | Republican | R+31.3 |
| LAWRENCE, IL | Republican | R+23.1 |
| LEE, IL | Democratic | D+5.1 |
| LIVINGSTON, IL | Republican | R+27.8 |
| LOGAN, IL | Republican | R+8.6 |
| MACON, IL | Republican | R+3.6 |
| MACOUPIN, IL | Democratic | D+16.7 |
| MADISON, IL | Democratic | D+11.6 |
| MARION, IL | Democratic | D+10.3 |
| MARSHALL, IL | Republican | R+11.5 |
| MASON, IL | Republican | R+0.4 |
| MASSAC, IL | Democratic | D+16.7 |
| MCDONOUGH, IL | Republican | R+24.1 |
| MCHENRY, IL | Republican | R+33.3 |
| MCLEAN, IL | Republican | R+23.9 |
| MENARD, IL | Republican | R+2.3 |
| MERCER, IL | Republican | R+10.0 |
| MONROE, IL | Republican | R+3.4 |
| MONTGOMERY, IL | Democratic | D+14.8 |
| MORGAN, IL | Republican | R+6.5 |
| MOULTRIE, IL | Democratic | D+10.7 |
| OGLE, IL | Republican | R+10.9 |
| PEORIA, IL | Republican | R+14.3 |
| PERRY, IL | Republican | R+4.7 |
| PIATT, IL | Republican | R+10.4 |
| PIKE, IL | Democratic | D+9.8 |
| POPE, IL | Republican | R+0.2 |
| PULASKI, IL | Democratic | D+0.8 |
| PUTNAM, IL | Democratic | D+4.0 |
| RANDOLPH, IL | Democratic | D+14.4 |
| RICHLAND, IL | Republican | R+15.7 |
| ROCK ISLAND, IL | Republican | R+10.3 |
| SALINE, IL | Democratic | D+3.5 |
| SANGAMON, IL | Democratic | D+1.4 |
| SCHUYLER, IL | Democratic | D+2.7 |
| SCOTT, IL | Republican | R+2.7 |
| SHELBY, IL | Democratic | D+14.5 |
| ST. CLAIR, IL | Democratic | D+22.9 |
| STARK, IL | Republican | R+18.5 |
| STEPHENSON, IL | Republican | R+22.2 |
| TAZEWELL, IL | Republican | R+10.1 |
| UNION, IL | Democratic | D+12.0 |
| VERMILION, IL | Democratic | D+6.7 |
| WABASH, IL | Republican | R+26.1 |
| WARREN, IL | Republican | R+23.3 |
| WASHINGTON, IL | Republican | R+9.9 |
| WAYNE, IL | Republican | R+1.4 |
| WHITE, IL | Republican | R+4.5 |
| WHITESIDE, IL | Republican | R+8.5 |
| WILL, IL | Republican | R+10.5 |
| WILLIAMSON, IL | Democratic | D+1.8 |
| WINNEBAGO, IL | Republican | R+9.3 |
| WOODFORD, IL | Republican | R+17.6 |
presidential baselinePresident 1976R+2.0Senate 1978R+7.9vs. baselineR+5.9
Illinois's 1978 Senate race ran 5.9 points more Republican than its 1976 presidential margin.
Illinois's Senate margins
Every comparable D–R contest in our store, 1978–2022
| Year | Margin (D minus R) |
|---|---|
| 1978 | −7.9% |
| 1980 | +13.5% |
| 1984 | +1.9% |
| 1986 | +31.4% |
| 1990 | +30.1% |
| 1992 | +10.2% |
| 1996 | +15.4% |
| 1998 | −2.9% |
| 2002 | +22.3% |
| 2004 | +42.9% |
| 2008 | +39.3% |
| 2010 | −1.6% |
| 2014 | +10.9% |
| 2016 | +15.1% |
| 2020 | +16.1% |
| 2022 | +15.3% |
Same ballot, 1978IL
Source. MIT Election Data + Science Lab — 1978 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.