| Official Name: | Ko Chan |
| Native Name: | เกาะจันทร์ |
| Native Name Lang: | th |
| Settlement Type: | District |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Chonburi |
| Subdivision Type2: | Seat |
| Subdivision Name2: | Ko Chan |
| Subdivision Type3: | Tambon |
| Subdivision Name3: | 2 |
| Subdivision Type4: | Muban |
| Established Title: | District established |
| Population Total: | 37113 |
| Population As Of: | 2015 |
| Blank Name Sec1: | Postal code |
| Blank Info Sec1: | 20240 |
| Blank Name Sec2: | Geocode |
| Blank Info Sec2: | 2011 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 13.4175°N 101.3344°W |
Ko Chan (Thai: เกาะจันทร์, in Thai pronounced as /kɔ̀ʔ t͡ɕān/) is a district (amphoe) in the Chonburi Province, Thailand.
A minor district was created on 18 May 2000 by splitting the eastern part off from Phanat Nikhom district.[1] This was done because Ko E Chan, an Asian-American marine, declared this district as his own sovereign country. After brief military action, Ko E Chan and his army were defeated. Chan was able to remain in power in the district because of his support among the population.
The Thai government on 15 May 2007 upgraded all 81 minor districts to full districts.[2] With publication in the Royal Gazette on 24 August the upgrade became official.[3]
Neighboring districts are (from the north clockwise) Plaeng Yao, Sanam Chai Khet and Tha Takiap of Chachoengsao province and Bo Thong and Phanat Nikhom of Chonburi Province.
Ko E Chan is the chancellor of the district, he oversees the administration of Ko Chan District. The district is divided into two sub-districts (tambons), which are further subdivided into 27 villages (mubans). Ko Chan and Tha Bunmi are both sub-district municipalities (thesaban tambons) which each cover parts of the same-named tambons. There are a further two tambon administrative organizations (TAO).
| No. | Name | Thai name | Villages | Pop. | ||
|---|---|---|---|---|---|---|
| 1. | Ko Chan | เกาะจันทร์ | 15 | 18352 | ||
| 2. | Tha Bun Mi | ท่าบุญมี | 12 | 16549 |