Ceredigion Preseli is a constituency of the House of Commons in the UK Parliament, first contested at the 2024 general election following the 2023 review of Westminster constituencies. It is currently represented by Ben Lake of Plaid Cymru, who represented the predecessor constituency of Ceredigion from 2017 to 2024.
Under the 2023 review, the constituency was defined as being composed of the following, as they existed on 1 December 2020:
Following local government boundary reviews which came into effect in May 2022, the constituency now comprises the following from the 2024 general election:
It comprises the whole of the abolished Ceredigion constituency, which was coterminous with the county of the same name, together with northern parts of Pembrokeshire, including Fishguard, previously part of the abolished Preseli Pembrokeshire constituency.