| Niijuku | |
| Native Name: | 新宿 |
| Native Name Lang: | ja |
| Settlement Type: | District |
| Pushpin Map: | Japan Tokyo |
| Coordinates: | 35.7691°N 139.8708°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | City |
| Subdivision Name1: | Tokyo |
| Subdivision Type2: | Ward |
| Subdivision Name2: | Katsushika |
| Subdivision Type3: | Area |
| Unit Pref: | Metric |
| Population As Of: | December 1, 2017 |
| Population Footnotes: | [1] |
| Population Total: | 15,172 |
| Population Density Km2: | auto |
| Timezone1: | JST |
| Utc Offset1: | +9 |
| Postal Code Type: | Postal code |
| Postal Code: | 125-0051[2] |
| Area Code: | 03[3] |
is a district of Katsushika, Tokyo, Japan.
Katsushika City Board of Education operates area public elementary and junior high schools.
1 and 2 and 4 and 5-chome are zoned to Niijuku Elementary School (新宿小学校). 3-chome 1-28 ban are zoned to Shibahara Elementary School (柴原小学校) while 3-chome 29-33 ban are zoned to Sumiyoshi Elementary School (住吉小学校). The following parts of 6-chome are zoned to the following schools: 1 and 6-ban to Iizuka Elementary School (飯塚小学校), 2-ban to Higashi (East) Kanamachi Elementary School (東金町小学校), and 3-5 and 7-8 ban to Hananoki Elementary School (花の木小学校).[4]
1-5-chome are zoned to Niijuku Junior High School (新宿中学校). 6-chome is zoned to Kanamachi Junior High School (金町中学校).[5]