Si Satchanalai () is the northernmost district (
Amphoe) of
Sukhothai Province, northern
Thailand.
Geography

Wat Chang Lom in Si Satchanalai National Historical Park
Neighboring districts are (from the southwest clockwise):
Si Nakhon,
Sawankhalok,
Thung Saliam of Sukhothai Province,
Thoen of
Lampang Province,
Wang Chin of
Phrae Province,
Laplae and
Tron of
Uttaradit Province.
History
Si Satchanalai was the second-most important town of the
Sukhothai kingdom. The ruins of its temples are now part of the
Si Satchanalai historical park, which is part of UNESCO world heritage site of Sukhothai.
The district was renamed from Hat Siao to Si Satchanala in 1939.
Administration

Yom River in Amphoe Si Satchanalai area
The district is subdivided into 11 subdistricts (
tambon), which are further subdivided into 148 villages (
muban). There are two townships (
thesaban tambon) - Hat Siao covers parts of
tambon hat Siao, and Si Satchanalai cover the whole
tambon Si Satchanalai, Tha Chai and parts of Nong O. There are further 8 Tambon administrative organizations (TAO).