Like the other 576 French constituencies, it elects one MP using a two round electoral system.
The 4th Constituency of Maine-et-Loire is situated in the south east of the department.
It includes the south of Saumur a town famed for its wine production, the northern half of the town is contained within Maine-et-Loire's 3rd constituency.
Politically the seat has historically favoured centre right candidates.
It did, however, elect a Green Party deputy in 1997 and along with the majority of seats in Maine-et-Loire opt for En Marche!