2014 Clacton by-election

On 9 October 2014, a by-election was held for the UK parliamentary constituency of Clacton in Essex, England. The by-election was triggered by the Conservative MP for Clacton, Douglas Carswell, defecting to the UK Independence Party (UKIP) and subsequently resigning his seat to seek re-election as its candidate.

Standing for UKIP, Carswell retained the seat with 59.7% of the vote, becoming UKIP's first elected MP. The Conservatives came second, and Labour third. According to John Curtice, professor of politics at Strathclyde University, the result was the biggest increase in the share of a vote for any party in any by-election in history.