新城市（日语：新城市／しんしろし）是爱知县东部东三河地区的市。是爱知县内面积第二大，仅次于丰田市的自治体。

Shinshiro(新城市,Shinshiro-shi) is a city located in Aichi Prefecture, Japan.

As of May 2015, the city had an estimated population of 47,074 and a population density of 94.3 persons per km. The total area was 499.23 square kilometres (192.75 sq mi).