Wilmont is a city in Nobles County, Minnesota, United States. The population was 339 at the 2010 census. According to the United Stat…Wilmont is a city in Nobles County, Minnesota, United States. The population was 339 at the 2010 census. According to the United States Census Bureau, the city has a total area of 1.14 square miles, all land. By elevation, Wilmont is the highest incorporated community in Nobles County.