Viangchan (laotlahtōlli: ວຽງຈັນ, Viangchan[wíaŋ tɕàn]) in Lao ītēcuacān. Tlatēctli īpan in tlahuelmayān in ātōyātl Mekong. In Āltepētl ōpix cequintin 200,000 chānehqueh īpan in 2013, tel in āltepēnānyōtl, in Prefectura Viangchan, piya cequintin 783,000 chānehqueh.

Pha That Luang teōcalli, Viangchan