Semboku (仙北町 Semboku-machi?) was a town located in Senboku District, Akita Prefecture, Japan.
In 2003, the town had an estimated population of 7,803 and a density of 145.54 persons per km². The total area was 29.55 km².
On March 22, 2005, Semboku, along with the city of Ōmagari; the towns of Kamioka, Kyōwa, Nakasen, Nishisenboku, Ōta; and the village of Nangai (all from Senboku District), merged to create the city of Daisen.