Shūnan (周南市, Shūnan-shi?) is a city located in east central Yamaguchi Prefecture, Japan.
The city was founded on April 21, 2003, merging two former cities, Tokuyama and Shinnan'yō and two towns, Kano and Kumage.
Its name is derived from the first character (周) of the name of the former Suō Province (周防国), and the character for south (南), reflecting its location, comprising much of the southern part of the old province.
The city is bordered in the west by the cities of Yamaguchi and Hōfu, in the east by Iwakuni, in the southeast by Hikari and Kudamatsu, and in the north by Yoshika, Shimane Prefecture. To the south is the Inland Sea.