Kita-ku is one of the eight wards of Niigata City, Niigata Prefecture, in the Hokuriku region of Japan. As of 1 September 2018, the ward had an estimated population of 74,559 in households and a population density of 690 persons per km². The total area of the ward was 107.72 square kilometres (41.59 sq mi).

Niigata is a city located in the northern part of Niigata Prefecture. It is the capital and the most populous city of Niigata Prefecture, and one of the cities designated by government ordinance of Japan, located in the Chūbu region of Japan. It is the most populous city on the west coast of Honshu, and the second populous city in Chūbu region after Nagoya. It faces the Sea of Japan and Sado Island. As of 1 September 2022, the city had an estimated population of 779,049, and a population density of 1,072 persons per km2. The total area is 726.45 square kilometres (280.48 sq mi). Greater Niigata, the Niigata Metropolitan Employment Area, has a GDP of US$43.3 billion as of 2010.