| Nishi-ku | |
| Official Name: | Nishi Ward |
| Native Name Lang: | ja |
| Settlement Type: | Ward |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | |
| Coordinates: | 37.8741°N 138.9716°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kōshin'etsu, Hokuriku (Chūbu) |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Niigata |
| Subdivision Type3: | City |
| Subdivision Name3: | Niigata |
| Area Total Km2: | 94.09 |
| Population Total: | 161,884 |
| Population As Of: | September 1, 2018 |
| Population Density Km2: | auto |
| Timezone1: | Japan Standard Time |
| Utc Offset1: | +9 |
| Blank Name Sec1: | Nishi Ward Office |
| Blank1 Name Sec1: | Address |
| Blank1 Info Sec1: | 3-14-41 Terao-Higashi, Nishi-ku, Niigata-shi, Niigata 950-2097 |
| Blank Name Sec2: | Phone number |
| Blank Info Sec2: | 025-268-1000 |
is one of the eight wards of Niigata City, Niigata Prefecture, in the Hokuriku region of Japan., the ward had an estimated population of 161,884 in 68,119 households [1] and a population density of 1700 persons per km2. The total area of the ward was 94.09sqkm.
Nishi-ku is located in a central Niigata city, bordered by the Sea of Japan to the north. The Shinano River flow through the ward.
The area of present-day Nishi-ku was part of ancient Echigo Province. The village of was founded on November 1, 1901 by the merger of five villages, and was raised to town status on February 1, 1973. It was annexed by Niigata city on January 1, 2001. The villages of, and were also established on November 1, 1901. Uchino was raised to town status on October 1, 1928 and was annexed by Niigata city on January 11, 1960. Niigata annexed Akatsuka and Nakanokoya on June 1, 1961. Niigata became a government-designated city on April 1, 2007 and was divided into wards, with the new Nishi Ward consisting of the former towns of Kurosaki and Uchino, and villages of Akatsuka and Nakanokoya.
Nishi-ku has eight public middle schools operated by the Niigata city government. The ward has three public high schools operated by the Niigata Prefectural Board of Education, one private high school and one private combined middle/high school.