Nanza is the Ponca name for what is now called Ponca Fort. It was a fortified village built by the Ponca in the vicinity of present-day Niobrara, Nebraska, USA, in circa 1700 and occupied until about 1865. The site of Nanza is located at the fork where Ponca Creek meets the Niobrara River, west of the Niobrara River's entry into the Missouri River. It is located in what is now Knox County, Nebraska, near the town of Verdel. On April 3, 1973, the Ponca Fort was added to the National Register of Historic Places.