The Roman Catholic Metropolitan Archdiocese of Aracaju (Latin: Archidioecesis Metropolitae Aracaiuensis) is a Latin Metropolitan archdiocese in the State of Sergipe, northeastern Brazil.

Its cathedral archiepiscopal see is Our Lady of the Conception Cathedral (Catedral Metropolitana Nossa Senhora da Conceiçao), dedicated to Our Lady of Immaculate Conception, in the city of Aracaju.

Two World Heritage Sites are owned by the Archdiocese in São Cristóvão, Sergipe: the Misericórdia Hospital and Church (Igreja de Santa Casa de Misericórdia) and the Church and Convent of Santa Cruz, also known as the Church and Convent of Saint Francis.

It was established on January 3, 1910, as Diocese of Aracaju, on territory split off from the Metropolitan Archdiocese of São Salvador da Bahia.

Its Suffragan dioceses are both daughter sees : Bishop of Petrolina, Pernambuco in 1946; future Cardinal