Nayoro (Japanese: 名寄市; -shi, Ainu: Nay Oro) is a city located in Kamikawa, Hokkaido, Japan.
As of 2003, the city has an estimated population of 27,311 and the density of 86.81 persons per km². The total area is 314.62 km².
The city was incorporated on April 1, 1956.
