Alexandru Theodor Cisar (21 October 1880 – 7 January 1954) was a Romanian cleric, bishop of the Roman Catholic Diocese of Iași and archbishop of the Roman Catholic Archdiocese of Bucharest.
Upon his return to Romania, he was named secretary to Archbishop Joseph-Xavier Hornstein [de] and dean of students at the seminary.
In 1920, he was consecrated bishop at Saint Joseph's Cathedral and was installed in Iași.
In 1921, the parishes of Bessarabia, recently united with Romania, were incorporated into his diocese.
He was also interim Apostolic Administrator of Iași until 1925, when Mihai Robu was named bishop.