Iowa — 1984 U.S. Senate election
Recent presidential results
Akashicstate1984 Senate electionIowa · U.S. SenateHarkinD+11.8
How it voted
Share of the 1984 vote
| Tom Harkin ✓Democrat | 55.5% | 716,883 |
|---|---|---|
| Roger W. Jepsen (i)Republican | 43.7% | 564,381 |
| Garry De YoungIndependent | 0.9% | 11,014 |
1984Senate margin
D+60R+60
99 counties, each filled by 1984 D-vs-R margin. Hover any county for its result.
County-level results (99 counties) — table
| County | Winner | Margin |
|---|---|---|
| ADAIR, IA | Democratic | D+21.3 |
| ADAMS, IA | Democratic | D+10.2 |
| ALLAMAKEE, IA | Republican | R+18.8 |
| APPANOOSE, IA | Democratic | D+11.6 |
| AUDUBON, IA | Democratic | D+18.3 |
| BENTON, IA | Democratic | D+9.7 |
| BLACK HAWK, IA | Democratic | D+12.5 |
| BOONE, IA | Democratic | D+30.1 |
| BREMER, IA | Republican | R+6.1 |
| BUCHANAN, IA | Democratic | D+7.8 |
| BUENA VISTA, IA | Democratic | D+11.5 |
| BUTLER, IA | Republican | R+18.8 |
| CALHOUN, IA | Democratic | D+11.3 |
| CARROLL, IA | Democratic | D+27.2 |
| CASS, IA | Republican | R+9.8 |
| CEDAR, IA | Republican | R+1.3 |
| CERRO GORDO, IA | Democratic | D+10.8 |
| CHEROKEE, IA | Democratic | D+16.0 |
| CHICKASAW, IA | Democratic | D+10.4 |
| CLARKE, IA | Democratic | D+25.5 |
| CLAY, IA | Democratic | D+17.2 |
| CLAYTON, IA | Republican | R+4.2 |
| CLINTON, IA | Democratic | D+7.8 |
| CRAWFORD, IA | Democratic | D+15.5 |
| DALLAS, IA | Democratic | D+27.6 |
| DAVIS, IA | Democratic | D+19.1 |
| DECATUR, IA | Democratic | D+29.3 |
| DELAWARE, IA | Republican | R+0.1 |
| DES MOINES, IA | Democratic | D+20.5 |
| DICKINSON, IA | Democratic | D+6.7 |
| DUBUQUE, IA | Democratic | D+18.9 |
| EMMET, IA | Democratic | D+7.5 |
| FAYETTE, IA | Democratic | D+2.5 |
| FLOYD, IA | Democratic | D+5.1 |
| FRANKLIN, IA | Democratic | D+3.6 |
| FREMONT, IA | Republican | R+4.6 |
| GREENE, IA | Democratic | D+28.7 |
| GRUNDY, IA | Republican | R+24.7 |
| GUTHRIE, IA | Democratic | D+23.3 |
| HAMILTON, IA | Democratic | D+10.5 |
| HANCOCK, IA | Republican | R+4.9 |
| HARDIN, IA | Democratic | D+11.2 |
| HARRISON, IA | Democratic | D+5.7 |
| HENRY, IA | Democratic | D+2.4 |
| HOWARD, IA | Republican | R+0.5 |
| HUMBOLDT, IA | Democratic | D+5.9 |
| IDA, IA | Democratic | D+3.5 |
| IOWA, IA | Republican | R+5.0 |
| JACKSON, IA | Democratic | D+12.0 |
| JASPER, IA | Democratic | D+13.2 |
| JEFFERSON, IA | Democratic | D+2.9 |
| JOHNSON, IA | Democratic | D+37.7 |
| JONES, IA | Democratic | D+2.7 |
| KEOKUK, IA | Democratic | D+13.7 |
| KOSSUTH, IA | Democratic | D+14.1 |
| LEE, IA | Democratic | D+15.5 |
| LINN, IA | Democratic | D+10.3 |
| LOUISA, IA | Democratic | D+1.4 |
| LUCAS, IA | Democratic | D+16.6 |
| LYON, IA | Republican | R+39.5 |
| MADISON, IA | Democratic | D+26.6 |
| MAHASKA, IA | Republican | R+0.1 |
| MARION, IA | Democratic | D+12.9 |
| MARSHALL, IA | Democratic | D+10.1 |
| MILLS, IA | Republican | R+20.8 |
| MITCHELL, IA | Republican | R+5.2 |
| MONONA, IA | Democratic | D+13.6 |
| MONROE, IA | Democratic | D+27.1 |
| MONTGOMERY, IA | Republican | R+18.1 |
| MUSCATINE, IA | Republican | R+1.4 |
| OBRIEN, IA | Republican | R+9.0 |
| OSCEOLA, IA | Republican | R+13.0 |
| PAGE, IA | Republican | R+24.8 |
| PALO ALTO, IA | Democratic | D+21.3 |
| PLYMOUTH, IA | Republican | R+2.5 |
| POCAHONTAS, IA | Democratic | D+20.9 |
| POLK, IA | Democratic | D+23.0 |
| POTTAWATTAMIE, IA | Republican | R+2.4 |
| POWESHIEK, IA | Democratic | D+14.9 |
| RINGGOLD, IA | Democratic | D+29.1 |
| SAC, IA | Democratic | D+10.5 |
| SCOTT, IA | Democratic | D+9.4 |
| SHELBY, IA | Republican | R+0.6 |
| SIOUX, IA | Republican | R+47.9 |
| STORY, IA | Democratic | D+20.4 |
| TAMA, IA | Democratic | D+10.9 |
| TAYLOR, IA | Democratic | D+7.4 |
| UNION, IA | Democratic | D+17.0 |
| VAN BUREN, IA | Democratic | D+2.6 |
| WAPELLO, IA | Democratic | D+34.2 |
| WARREN, IA | Democratic | D+27.3 |
| WASHINGTON, IA | Democratic | D+0.8 |
| WAYNE, IA | Democratic | D+27.5 |
| WEBSTER, IA | Democratic | D+24.8 |
| WINNEBAGO, IA | Republican | R+8.3 |
| WINNESHIEK, IA | Democratic | D+3.3 |
| WOODBURY, IA | Democratic | D+13.2 |
| WORTH, IA | Democratic | D+9.2 |
| WRIGHT, IA | Democratic | D+8.7 |
presidential baselinePresident 1984R+7.4Senate 1984D+11.8vs. baselineD+19.2
Iowa's 1984 Senate race ran 19.2 points more Democratic than the presidential race on the same ballot.
Iowa's Senate margins
Every comparable D–R contest in our store, 1978–2022
| Year | Margin (D minus R) |
|---|---|
| 1978 | −3.2% |
| 1980 | −7.9% |
| 1984 | +11.8% |
| 1986 | −32.5% |
| 1990 | +9.1% |
| 1992 | −42.4% |
| 1996 | +5.1% |
| 1998 | −37.9% |
| 2002 | +10.4% |
| 2004 | −42.3% |
| 2008 | +25.4% |
| 2010 | −31.1% |
| 2014 | −8.3% |
| 2016 | −24.5% |
| 2020 | −6.6% |
| 2022 | −12.2% |
Same ballot, 1984IA
Source. MIT Election Data + Science Lab — 1984 US Senate returns, party-classified by literal ballot party · county returns aggregated from precinct-level results. Real returns — nothing estimated.