Kōhoku (江北町, Kōhoku-machi) is a town located in Kishima District, Saga Prefecture, Japan.

[3] The total area of the town is 24.88 km2 (9.61 sq mi) Saga Prefecture Kōhoku has a humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall.

The village of Oda, Yamaguchi and Sarushi were established on April 1, 1889 with the creation of the modern municipalities system.

Kōhoku, together with the other municipalities in Kishima District contributes two members to the Saga Prefectural Assembly.

In terms of national politics, the town is part of the Saga 2nd district of the lower house of the Diet of Japan.