Imaichi(今市市,Imaichi-shi) was a city located in Tochigi Prefecture, Japan.

As of 2003, the city had an estimated population of 62,517 and a population density of 256.72 persons per km². The total area was 243.52 km².

On March 20, 2006, Imaichi, along with the town of Ashio (from Kamitsuga District), the town of Fujihara, and the village of Kuriyama (both from Shioya District), was merged into the expanded city of Nikkō. Following this merger, the former Imaichi City Hall became the new Nikkō City Hall.