Leona Alleslev (born March 16, 1968) is a Canadian politician who was elected as a Liberal Member of Parliament to represent the riding of Aurora—Oak Ridges—Richmond Hill in the House of Commons in the 2015 federal election.
Alleslev was elected as a Liberal but, on September 17, 2018, she crossed the floor to join the Conservative Party, citing alleged disagreements with the Liberal government over their handling of the economy and foreign affairs.
On October 21, 2019, she was re-elected as a Conservative.
Following the 2019 Canadian federal election, Alleslev was appointed as Deputy Leader of the Conservative Party of Canada.