Nakhon Pa Mak (Thai: นครป่าหมาก) is a rural subdistrict (tambon) in the Bang Krathum District of Phitsanulok Province, Thailand.

Nakhon Pa Mak primarily consists of flat lowlands[1] in the Nan Basin, which is part of the Chao Phraya Watershed.

The Wang Thong River flows through Nakhon Pa Mak at the villages of Ban Sam Ruen and Bang Kranoi.

[2] Nakhon Pa Mak borders Tha Tan to the north-west, Mae Raka of Wang Thong District to the north-east, Wat Ta Yom to the east, Phai Lom to the south, and Bang Krathum to the west.

[3] The subdistrict is divided into 13 smaller divisions called (muban), which roughly correspond to the villages within Nakhon Pa Mak.