Rosen is an unincorporated community in Yellow Bank Township, Lac qui Parle County, Minnesota, United States. It is home to Saint Joseph's Catholic Church. The founding of Rosen is attributed to Father Peter Rosen, who came to St. Joseph's in 1895. It was during his pastorate that the church was incorporated and the village was given the name of R…Rosen is an unincorporated community in Yellow Bank Township, Lac qui Parle County, Minnesota, United States. It is home to Saint Joseph's Catholic Church. The founding of Rosen is attributed to Father Peter Rosen, who came to St. Joseph's in 1895. It was during his pastorate that the church was incorporated and the village was given the name of Rosen. Fr. Rosen suggested to the elderly people of the parish to form a village by building homes and stores around the church to live when they retired from farming.