The Sèvre Niortaise is a river in western France, flowing into the Atlantic Ocean. Its source is in the Deux-Sèvres département, near Sepvret, north of Melle.
It flows through the following départements and towns:
- Deux-Sèvres: Saint-Maixent-l'École, Niort
- Vendée: Damvix
- Charente-Maritime: Marans
It flows into the Atlantic Ocean in Bourg-Chapon, north of the city La Rochelle
. The largest city along the river is Niort, hence the name Sèvre Niortaise