The Municipality of Šempeter-Vrtojba (pronounced [ʃɛmˈpeːtəɾ ʋəɾˈtoːjba] or [ʃəmˈpeːtəɾ ʋəɾˈtoːjba] ; Slovene: Občina Šempeter - Vrtojba; Italian: Comune di San Pietro-Vertoiba) is a municipality in Slovenia. The municipality comprises the town of Šempeter pri Gorici and the adjacent village of Vrtojba.