Sichon (Thai: สิชล, pronounced [sìʔ.t͡ɕʰōn]) is a district (amphoe) of Nakhon Si Thammarat province, southern Thailand.

The district is in the northern part of the province. Neighboring districts are (from the south clockwise): Tha Sala and Nopphitam of Nakhon Si Thammarat Province; Kanchanadit and Don Sak of Surat Thani province; Khanom of Nakhon Si Thammarat. To the east is the Gulf of Thailand.

Namtok Si Khit National Park is in the district.

The district is divided into nine sub-districts (tambons), which are further subdivided into 106 villages (mubans). Sichon itself has township (thesaban tambon) status and covers part of tambon Khanom. There are a further nine tambon administrative organizations.

No. Name Thai name Villages Pop.      1. Sichon สิชล 10 14,957 2. Thung Prang ทุ่งปรัง 16 10,595 3. Chalong ฉลอง 10 6,374 4. Sao Phao เสาเภา 16 12,049 5. Plian เปลี่ยน 14 7,726 6. Si Khit สี่ขีด 12 9,109 7. Theppharat เทพราช 13 7,524 8. Khao Noi เขาน้อย 7 5,195 9. Thung Sai ทุ่งใส 8 10,452

• Si Khit Waterfall (น้ำตกสี่ขีด): a small waterfall in Namtok Si Khit National Park on top of a mountain 1,303 m (4,274.9 ft) above sea level, covered with various types of rainforests, including a very rich ecosystem.

• Wat Chedi (วัดเจดีย์): an ancient Buddhist temple more than 1,000 years old in Chalong Subdistrict, this place is famous for "I Khai" (ไอ้ไข่), a wood carving in the shape of a child, aged about 9–10 years old. He is believed to be a local boy who drowned in the temple area and became a Kuman Thong. Each day, many people pay obeisance to him to ask for fortune. Vows are often made to offer cock fighting figures or firecrackers.

• amphoe.com Archived 2014-07-14 at the Wayback Machine
• See Sichon - Hidden Gen of a beach near Suratthani