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 and municipal seat of Šempeter pri Gorici and the adjacent village of Vrtojba. It borders Italy.