Seiyo, Ehime
| Seiyo 西予市 | |
|---|---|
| Seiwa City Hall | |
| Location of Seiyo in Ehime Prefecture | |
| Coordinates: 33°21′46″N 132°30′39″E / 33.36278°N 132.51083°E | |
| Country | Japan | 
| Region | Shikoku | 
| Prefecture | Ehime | 
| Government | |
| • Mayor | Kazuo Kanke (since May 2016) | 
| Area | |
|  • Total | 514.34 km2 (198.59 sq mi) | 
| Population  (August 31, 2022) | |
|  • Total | 35,456 | 
| • Density | 69/km2 (180/sq mi) | 
| Time zone | UTC+09:00 (JST) | 
| City hall address | 3-434-1 Unomachi, Uwachō, Seiyo-shi, Ehime-ken 797-8501 | 
| Website | Official website | 
| Symbols | |
| Bird | Japanese bush warbler (鶯, uguisu) | 
| Flower | Chinese milkvetch (蓮華草, rengesō) | 
| Tree | Japanese beech (山毛欅, buna) | 
Seiyo (西予市, Seiyo-shi) is a city located in Ehime Prefecture, Japan. As of 31 August 2022, the city had an estimated population of 35,456 in 17627 households and a population density of 69 persons per km². The total area of the city is 514.34 square kilometres (198.59 sq mi).