Soi Dao is a district in the northern part of Chanthaburi Province, eastern Thailand.HistoryThe government created the minor district Soi Dao on 1 January 1988, by splitting off five tambon from Pong Nam Ron district. It was upgraded to be full district on 9 May 1992.GeographyNeighboring districts are Pong Nam Ron, Khao Khitchakut, Kaeng Hang Maeo of Chanthaburi Province, Wang Sombun, and Khlong Hat of Sa Kaeo Province. To the east is Battambang Province of Cambodia.AdministrationThe district is divided into five sub-districts, which are further subdivided into 68 villages . Sai Khao is a township which covers parts of tambon Sai Khao and Pa Tong. There are a further five tambon administrative organizations .