1984 United States Senate elections

The 1984 United States Senate elections were held on November 6, with the 33 seats of Class 2 contested in regular elections. They coincided with the landslide re-election of President Ronald Reagan in the presidential election. In spite of the lopsided presidential race, Reagan's Republican Party suffered a net loss of two Senate seats to the Democrats, although it retained control of the Senate with a reduced 53–47 majority.

Democrats defeated incumbents in Illinois and Iowa, and won an open seat in Tennessee, while Republicans defeated an incumbent in Kentucky. This was the first time since 1972 that Democrats gained Class 2 Senate seats.

Results summary

{| style="width:70%; text-align:center"

|+ ↓

|- style="color:white"

| style="background:; width:47%" | 47

| style="background:; width:53%" | 53

| Democratic

| Republican

{| class=wikitable style=text-align:center

|- valign=bottom

! rowspan=2 colspan=2 | Parties

| style="background-color:" |

! rowspan=2 | Total

|- valign=bottom

! Democratic

! Republican

! Libertarian

! Other

! colspan=2 | Last elections (1982)

| 46

| | 54

| 0

! 100

! colspan=2 class=small | Before these elections

| 45

| | 55

| 0

! 100

! colspan=2 style="background:#bbb" | Not up

| 31

| | 36

| —

! 67

| colspan=100 |

! colspan=2 style="background:#bbb" | Up<br />

| 14

| | 19

| —

! 33

| colspan=100 |

! colspan=2 style="background:#ccc" | Incumbent retired

| 2

| —

! 4

! rowspan=3 |

| | 2

| 1

| —

! 3

| colspan=2 | 1 Republican replaced by 1 Democrat

| —

! 1

! Result

! | 3

! 1

! —

! 4

! colspan=2 style="background:#ccc" | Incumbent ran

| 12

| | 17

| —

! 29

! rowspan=4 |

| 11

| | 15

| —

! 26

| colspan=2 | 2 Republicans replaced by 2 Democrats<br /> 1 Democrat replaced by 1 Republican

| —

! 3

| 0

| —

! 0

! Result

! 13

! | 16

! —

! 29

| colspan=100 |

! colspan=2 | Total elected

! 16

! | 17

! 0

! 33

! colspan=2 | Net gain/loss

| | 2

| 2

! 2

! colspan=2 style="background:#ccc" | Nationwide vote

| | 23,079,278

| 22,850,493

| 160,798

| 232,231

! 46,322,800

!

! Share

| | 49.82%

| 49.33%

| 0.35%

| 0.50%

! 100%

! colspan=2 | Result

! 47

! | 53

! 0

! 100

Source: Office of the Clerk

Alaska

Incumbent Republican Ted Stevens sought re-election to a fourth term. Owing to his popularity and the conservative bent of Alaska, Stevens did not face major opposition, and easily defeated former Alaska Attorney General John Havelock in the general election.

Arkansas

Incumbent Democrat David Pryor won re-election to a second term over Republican U.S. Representative Ed Bethune.

Colorado

Incumbent Republican William L. Armstrong won re-election to a second term over Democratic Lieutenant Governor of Colorado Nancy E. Dick.