Setouchi, Okayama
Setouchi 
    瀬戸内市  | |
|---|---|
Ushimado Port and resort area  | |
Location of Setouchi in Okayama Prefecture  | |
| Coordinates: 34°40′N 134°6′E / 34.667°N 134.100°E | |
| Country | Japan | 
| Region | Chūgoku (San'yō) | 
| Prefecture | Okayama | 
| Government | |
| • Mayor | Kentaro Kuroishi (since June 2025) | 
| Area | |
 • Total  | 125.45 km2 (48.44 sq mi) | 
| Population  (February 1, 2023)  | |
 • Total  | 36,499 | 
| • Density | 290/km2 (750/sq mi) | 
| Time zone | UTC+09:00 (JST) | 
| City hall address | 300-1 Oku-cho Owari, Setouchi-shi, Okayama-ken 701-4292 | 
| Climate | Cfa | 
| Website | Official website | 
| Symbols | |
| Bird | Japanese white-eye | 
| Flower | Chrysanthemum | 
| Tree | Olive | 
Setouchi (瀬戸内市, Setouchi-shi) is a city located in southern Okayama Prefecture, Japan. As of 31 January 2023, the city had an estimated population of 36,499 in 15,934 households and a population density of 290 persons per km². The total area of the city is 125.45 square kilometres (48.44 sq mi).