Wainwright (WANE-rite) (Ulġuniq in Iñupiaq), also known as Ulguniq or Kuuk, is a city in North Slope Borough, Alaska, United States. At the 2010 census the population was 556, making it the third largest city in the North Slope Borough. The community was named after Wainwright Lagoon, which in turn was named after Lt. John Wainwright, an officer under Capt. F.W.