Sien is a village in the Toma Department in the province of Nayala in Burkina Faso. Sien has a population of 707.[1] [1]"LISTE DES VILLAGES DE LA REGION DE LA BOUCLE DU MOUHOUN". Government of Burkina Faso. Archived from the original on 24 January 2008. Retrieved 12 January 2013.12.6926°N 2.8987°W / 12.6926; -2.8987 This Mouhoun Province location article is a stub. You can help Wikipedia by expanding it.vte