The Sioux Valley Conference was a high school athletic conference in northwest Iowa that existed until 1988–89. The conference dates back to at least the early 1930s and is notable for its stability throughout its history. From 1949 until 1988, no school left or joined the league, although a few schools did grow through consolidation over the years. During its existence, it was one of the premier small school conferences in the state for boys' sports, boasting six state champions in basketball, two in football (in the 9 short years it coexisted with the state playoffs), and six in track & field.