The riding of Oxford was vacated on January 28, 2023, following the resignation of Conservative MP Dave MacKenzie, who had held the seat since 2004.

Arpan Khanna, the party's national outreach chair and 2019 candidate in Brampton North[5] defeated Woodstock city-county councillor Deb Tait, MacKenzie's daughter and former ministerial staffer Rick Roth for the Conservative nomination.

[6][7] Gerrit Van Dorland, executive assistant to Cypress Hills—Grasslands MP Jeremy Patzer was running for the nomination until he was disqualified by the Conservatives over a dispute about whether he disclosed information to the party.

[12][13][14] Citing concerns with the Conservative nomination process, previous MP Dave MacKenzie endorsed Hilderley in April 2023.

[12] Western University professor Cody Groat defeated Matthew Chambers, the party candidate for the riding in the 2019 and 2021 elections for the NDP nomination.