Ruaudin is a commune in the department of Sarthe in the Pays de la Loire Region of north-western France. Ruaudin is located in the canton of Écommoy and the arrondissement of Le Mans. The INSEE code is 72260 and the postal code is 72230. The minimum elevation is 47 meters and the maximum elevation is 66 meters. The town has a total surface area of 13.78 km2. The population of Ruaudin was 2,862 in 1999, 3,322 in 2007 and 3,418 in 2017.