The total area of the ward was 75.42 square kilometres (29.12 sq mi).

The area of present-day Kōnan-ku was part of ancient Echigo Province.

The modern town of Kameda and the village of Yokogoshi were established on April 1, 1889 within Nakakanbara District, Niigata with the establishment of the municipalities system.. Yokogoshi was raised to town status on November 1, 1996.

Niigata became a government-designated city on April 1, 2007 and was divided into wards, with the new Kōnan Ward consisting of the former town of Kameda, village of Yokogoshi, and the Sonoki (曽野木), Ryokawa (両川) and Oeyama (大江山) neighbourhoods of southern Niigata City.

JR East - Shin'etsu Main Line Media related to Konan-ku, Niigata at Wikimedia Commons