Washington–Kosciusko Elementary School (W-K for short) is an elementary school in Winona, Minnesota, United States. Its building was constructed in 1934, the fourth of five new facilities built by Winona Public Schools in the early 20th century to implement progressive educational reforms. It was listed on the National Register of Historic Places in 2012 for its significance in the theme of education. It was nominated for representing the 20th-century development of Winona Public Schools and for being a project of the Public Works Administration, the largest federal relief program of the New Deal.