The 1st constituency of the Loiret (French: Première circonscription du Loiret) is a French legislative constituency in the Loiret département.

Like the other 576 French constituencies, it elects one MP using a two round electoral system.

The 1st Constituency of the Loiret stretches from the western suburbs of Orléans towards the western edge of department.

In common with the department as a whole the seat has historically tended towards the centre right.

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