PONCA PONCAH - PONKA Click for KAW, OSAGE, OMAHA, or QUAPAW   Ponca Territory: South central South Dakota - northern Nebraska.   Portals .   Ponca Tribe of Nebraska Niobrara, Nebraska   Ponca Tribe of Oklahoma Ponca City, Oklahoma Ponca Population United States (2010) - 3,800 S I O U X DHEGIHA