Rejoin EU is a pro-European minor political party in the United Kingdom, advocating for the country's re-entry into the European Union following its withdrawal, commonly known as Brexit. It was launched in February 2020.^[1] Brendan Donnelly is the current leader and Richard Hewison is the current treasurer.^[2]

The party has 1 elected representative. Party chairman Andrew Smith, was elected to the parish council in Goring-on-Thames, South Oxfordshire in 2022.

Richard Hewison was the party's candidate in the 2021 London mayoral election, and was endorsed by Volt UK. He came eighth out of twenty candidates, with 1.1% of the vote.^{[citation needed]}

The party stood candidates in the Chesham and Amersham by-election, Batley and Spen by-election and North Shropshire by-election, each time receiving less than 0.5% of the votes.^[3] Hewison stood for the party in the 2021 Old Bexley and Sidcup by-election and received 0.7% of the vote.^{[citation needed]}

In July 2022, the party's chairman Andy Smith won a seat in Goring-on-Thames Parish Council, marking the party's first electoral success.^[2]

In November 2022, Hewison stood as the party's candidate in the City of Chester by-election, winning 1.0% of the vote. In December 2022, Jim Newell stood for Rejoin EU in the 2022 Stretford and Urmston by-election and won 1.3% of the vote.^{[citation needed]}

In July 2023, Hewison stood as a candidate in the Uxbridge and South Ruislip by-election, receiving 0.3% of the vote.^[4]

In the 2024 London Assembly election, the party received 2.5% of the vote, amounting to 62,528 votes, securing sixth place.^[5]

Rejoin EU stated it intended to stand 26 candidates in the 2024 general election,^[6][7] including their leader Brendan Donnelly standing in Finchley and Golders Green.^[8] The party got 9,245 votes, all candidates lost their election deposits and all candidates achieved under 2% of the vote.