Niijuku (新宿) is a district of Katsushika, Tokyo, Japan.

Katsushika City Board of Education operates area public elementary and junior high schools.

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).

[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).