Chai Nam (Thai: ชัยนาม) is a subdistrict in Wang Thong district, Phitsanulok province.

The southernmost part of Khao Noi–Khao Pradu Non-hunting Area is located in Moo1.

[2] The Wang Thong River flows through the subdistrict and lies in the Nan Basin, which is part of the Chao Phraya Watershed.

Chai Nam subdistrict is home to the following active temples, where Theravada Buddhism is practiced by local residents.

[5] The majority of people, about 80 percent, work in agriculture: growing rice, fruit orchards and vegetable crops.