Lampang city is situated in the valley of the Wang River in the heart of Northern Thailand, bordered by the Khun Tan Range on the west and the Phi Pan Nam Range on the east. The river, a major tributary of the Chao Phraya, flows directly through the city. The city lies mainly on the south side of Wang River, although the old parts of the city had been originally developed in the north side of it. Nowadays, the downtown of Lampang has grown in the south-east of the river along Bunyawat and Pahon Yothin roads, and the main roads of the city are lined by dense commercial and residential buildings.