Gōtsu is a city located in Shimane Prefecture, Japan.As of 30 June 2023, the city had an estimated population of 21,913 in 11196 households and a population density of 82 persons per km2. The total area of the city is 268.24 square kilometres (103.57 sq mi). It is the smallest and least populous city in Shimane Prefecture.

Shimane Prefecture is a prefecture of Japan located in the Chūgoku region of Honshu. Shimane Prefecture is the second-least populous prefecture of Japan at 665,205 and has a geographic area of 6,708.26 km2. Shimane Prefecture borders Yamaguchi Prefecture to the southwest, Hiroshima Prefecture to the south, and Tottori Prefecture to the east.