Khanom is the northernmost district of Nakhon Si Thammarat province, southern Thailand. The district is in the north of the province. To the …Khanom is the northernmost district of Nakhon Si Thammarat province, southern Thailand. The district is in the north of the province. To the west is Surat Thani province, while to the north and east is the Gulf of Thailand. Neighboring districts are Sichon of Nakhon Si Thammarat and Don Sak of Surat Thani.