Nanao (七尾市, Nanao-shi) is a city located in Ishikawa Prefecture, Japan.
As of March 1, 2010, the city has an estimated population of 58,204 and a population density of 183 persons per km². The total area is 318.02 km².
Nanao is the fifth largest city by population in Ishikawa, behind Kanazawa, Hakusan, Komatsu, and Kaga.
Nanao is situated in the middle of the Noto Peninsula and was the ancient capital of Noto Province. It has several popular onsen (hot springs) such as Wakura Onsen, a resort town which is regarded as one of the best onsen in Japan.
On March 25, 2007, the 2007 Noto earthquake shook Nanao and nearby communities.