The topography of Wang Nam Khu subdistrict is flat plains and is located in the lower northern part of Thailand.

[3] Wang Nam Khu subdistrict lies in the Nan Basin, which is part of the Chao Phraya Watershed.

The Nan River flows on the boundary of Wang Nam Khu and Ngio Ngam subdistricts.

Wang Nam Khu subdistrict is home to the following active temples, where Theravada Buddhism is practised by local residents:[5] Most of the people are engaged in agriculture of which rice is the main crop.

[9] All households in Wang Nam Ku subdistrict have access to the water network of Provincial Waterworks Authority (PWA).