1984 European Parliament election in the United Kingdom
| 1979 election |
| 1984 election |
| 1989 election |
| 1994 election |
| 1999 election |
The European Parliament Election, 1984 was the second European election to be held in the United Kingdom. The electoral system was First Past the Post in England, Scotland and Wales and Single Transferable Vote in Northern Ireland. The turnout was again the lowest in Europe. In England, Scotland and Wales, the Liberal Party and Social Democratic Party were in alliance, collecting 2,591,635 votes. The election represented a small recovery for Labour, under Michael Foot's replacement Neil Kinnock, taking 15 seats from the Conservatives. In the general election of 1983, they had only had a vote share of 2% more than the SDP-Liberal Alliance and 15% less than the Conservatives.
- Overall (England, Scotland, Wales and Northern Ireland) turnout: 33% (EC average: 61%)
- Overall votes cast: 13,998,190
England, Scotland and Wales
| Party | Votes | Seats | Loss/Gain | Share of Vote (%) |
| Conservative | 5,426,821 | 45 | -15 | 41 |
| Labour | 4,865,261 | 32 | +15 | 37 |
| Liberal Party | 1,358,145 | 0 | 0 | 10 |
| Social Democratic Party | 1,233,490 | 0 | 0 | 9 |
| Scottish National Party | 230,594 | 1 | 0 | 2 |
| Plaid Cymru | 103,031 | 0 | 0 | 1 |
| Ecology Party | 70,853 | 0 | 0 | 1 |
| Others | 24,678 | 0 | 0 | <1 |
Total votes cast - 13,312,873
Northern Ireland
| Party | Seats | Loss/Gain | First Preference Votes | ||
|---|---|---|---|---|---|
| Number | % of vote | ||||
| Democratic Unionist Party (DUP) | 1 | 0 | 230,251 | 34 | |
| Social Democratic and Labour Party (SDLP) | 1 | 0 | 151,399 | 22 | |
| Ulster Unionist Party (UUP) | 1 | 0 | 147,169 | 21 | |
| Sinn Fein (SF) | 0 | 0 | 91,476 | 13 | |
| Alliance Party of Northern Ireland (APNI) | 0 | 0 | 34,046 | 5 | |
| Workers Party | 0 | 0 | 8,712 | 1 | |
| Others | 0 | 0 | 22,264 | 3 | |
Total votes cast - 685,317
Party Leaders in 1984
- Conservative - Margaret Thatcher
- Labour - Neil Kinnock
- Liberal - David Steel
- SDP - David Owen
- SNP - Gordon Wilson
- Plaid Cymru - Dafydd Elis Thomas
- DUP - Ian Paisley
- SDLP - John Hume
- UUP - James Molyneaux