Dok Khamtai is a district (Amphoe

Amphoe

An amphoe is the second level administrative subdivision of Thailand. Usually translated as district, amphoe make up the provinces, and are analogous to a county seat...

) of Phayao Province

Phayao Province

Phayao is one of the northern provinces of Thailand. Neighboring provinces are Nan, Phrae, Lampang and Chiang Rai. In the north-east it borders Xaignabouli of Laos.- Geography :...

 in northern Thailand

Thailand

Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

.
Originally created in 1832, the district was abolished on December 23, 1917 and incorporated into Phayao district

Amphoe Mueang Phayao

Mueang Phayao is the capital district of Phayao Province, northern Thailand.-Geography:Neighboring districts are Mai Chai of Phayao Province, Pa Daet of Chiang Rai Province, Phu Kamyao, Dok Khamtai of Phayao Province again, Ngao and Wang Nuea of Lampang Province.-History:1917 the district Phayao...

. It was recreated as a minor district (King Amphoe) on January 24, 1963. It was finally upgraded back to a full district on July 27, 1965.
Dok Khamtai is the Thai name of Sponge Tree (Acacia farnesiana (L.) Willd.).