Oronoko Charter Township is a charter township of Berrien County in the U.S. state of Michigan. The population was 9,193 at the 2010 census. The village of Berrien Springs is the only incorporated municipality within the township. Much of the eastern portion of the township is considered to be part of the Berrien Springs urban area. The western portion is primarily agricultural. The township was organized on March 11, 1837, from a portion of Berrien Township. Part of the area was known as Feather Settlement starting in the 1830s.