Mamers is a commune located in the Sarthe department within the Pays de la Loire region of north-western France. It is situated near several neighboring communes, including Commerveil, Saint-Longis, Saint-Rémy-des-Monts, Origny-le-Roux, and Suré.
The town maintains a formal twinning relationship with the town of Market Rasen in Lincolnshire, England. It serves as a local administrative and residential area within its regional department.