The 1997 United Kingdom general election was held on Thursday, 1 May 1997. The governing Conservative Party led by Prime Minister John Major was defeated in a landslide by the opposition Labour Party led by Tony Blair, which achieved a 179-seat majority and a total of 418 seats.
This was the first victory for the Labour party in a general election in nearly 23 years, its previous one registering a majority of 3 seats in October 1974 under the leadership of Harold Wilson. It was also Labour's first comprehensive victory over the Conservatives since the 1966 election, which had produced a near 100-seat majority. This election also marked Labour's highest vote share since the 1970 election and its second highest total number of votes in history (the largest being the 1951 election). On the other hand, it was an ignominious end to the 18-year government of the Conservatives, the longest continuous period of government of any party in modern British history. This election marked the third-largest defeat ever suffered by the Conservatives (the largest being the 2024 election) with the party left with just 165 seats—it was left devoid of any MPs outside England, with only 17 MPs north of the Midlands, and with less than 20% of MPs in London. Additionally, the party also registered its lowest share of the vote since 1832 as well as its lowest vote in absolute terms since 1929. This would be the last election until 2024 that the Conservatives decreased their share of the vote.