Nesmy () is a commune in the Vendée department in the Pays de la Loire region in western France. It is located from the Atlantic Ocean and from La Roche-sur-Yon.
Nesmy is part of the Communauté d'agglomération La Roche-sur-Yon Agglomération (before 2010, it was : the Communauté de Communes du Pays Yonnais).
The river Yon forms most of the commune's north-eastern border.
Nesmy is famous for its potteries and tileries, an artisanal tradition.
The area has many hiking trails, points of interest include:
Nesmy houses the Zone of Activities of Le Chaillot, near to the A87 motorway.
Nesmy is twinned with Burggen, in Bavaria, which is close to the Alps in Germany, allowing for regular meetings.