Unnan (雲南市, Unnan-shi) is a city located in Shimane Prefecture, Japan.

Unnan City is located in southeastern Shimane Prefecturem with the southern areas in the Chugoku Mountains.

Unnan has a mayor-council form of government with a directly elected mayor and a unicameral city council of 19 members.

In terms of national politics, the city is part of the Shimane 1st district of the lower house of the Diet of Japan.

Unnan is a regional commercial center with a local economy based heavily on agriculture, forestry and light manufacturing.