The 3rd constituency of the Pyrénées-Orientales (French: Troisième circonscription des Pyrénées-Orientales) is a French legislative constituency in the Pyrénées-Orientales département.

Like the other 576 French constituencies, it elects one MP using the two-round system, with a run-off if no candidate receives over 50% of the vote in the first round.

The 3rd constituency of Pyrénées-Orientales stretches from Perpignan to the south western edge of the department.

The seat has broadly followed the national voting trends including the 2017 election when the voters elected the En Marche!

candidate, however there was also a strong performance by the National Front who came second.