Tapogliano bordered the following municipalities: Campolongo al Torre, Romans d'Isonzo, San Vito al Torre, Villesse.
Since 2009 it has been one of the two principal centres of Campolongo Tapogliano, a municipality formed by its merger with the former comune of Tapogliano.
Romans d'Isonzo borders the following municipalities: Gradisca d'Isonzo, Mariano del Friuli, Medea, San Vito al Torre, Tapogliano, Villesse.