Chinzei (鎮西町; -chou) had been a town located in Higashimatsuura District, Saga, Japan until merged on January 1, 2005 to be a part of the city of Karatsu.

As of 2003, the town had an estimated population of 7,203 and a density of 190.00 persons per km². The total area was 37.91 km².