Nam Kum is a subdistrict in the Nakhon Thai District of Phitsanulok Province, Thailand. Nam Kum is the northernmost subdistrict in Nakhon Thai. It is bordered to the northwest by Chat Trakan District, to the east by Loei Province, and to the south by Nakhon Chum. The subdistrict is primarily mountainous terrain, as it is in the Phetchabun Mountains. …Nam Kum is a subdistrict in the Nakhon Thai District of Phitsanulok Province, Thailand. Nam Kum is the northernmost subdistrict in Nakhon Thai. It is bordered to the northwest by Chat Trakan District, to the east by Loei Province, and to the south by Nakhon Chum. The subdistrict is primarily mountainous terrain, as it is in the Phetchabun Mountains. Nam Kum lies in the Nan Basin, which is part of the Chao Phraya Watershed.