| Nishi | |
| Official Name: | Nishi Ward |
| Native Name Lang: | ja |
| Settlement Type: | Ward |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | |
| Coordinates: | 34.6927°N 137.6453°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Chūbu |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Shizuoka |
| Subdivision Type3: | City |
| Subdivision Name3: | Hamamatsu |
| Area Total Km2: | 114.71 |
| Population Total: | 108501 |
| Population As Of: | December 1, 2019 |
| Population Density Km2: | auto |
| Timezone1: | Japan Standard Time |
| Utc Offset1: | +9 |
| Blank Name Sec2: | Phone number |
| Blank Info Sec2: | 053-597-1111 |
| Blank1 Name Sec2: | Address |
| Blank1 Info Sec2: | 1-31-1 Yūtō, Nishi-ku, Hamamatsu, Shizuoka 431-0193 |
| Website: | home page |
was a ward in Hamamatsu, Shizuoka, Japan, located in the southwest corner of the city. It is bordered by Naka-ku, Kita-ku, Minami-ku, and the city of Kosai. The 3rd largest ward of Hamamatsu in terms of area, much of the ward is still rural, with farms and rice fields.
Nishi-ku was created on April 1, 2007 when Hamamatsu became a city designated by government ordinance (a "designated city").
Nishi-ku is served by Maisaka Station and Bentenjima Station on the Tōkaidō Main Line railway.
International schools: