The 1st constituency of Allier is a French legislative constituency located in north east Allier département.

It takes in the town of Moulins, and has an estimated total population of 77,746.

* Jean Mallot stood as a dissident member of the Socialist Party, which is part of the NUPES alliance.

Therefore, the 2017 PS result is included in the NUPES total for swing calculations.

Mallot's swing is calculated against his own result from 2017.