Alessandro d'Este (1568–1624) was a Roman Catholic cardinal.

On 3 Apr 1622, he was consecrated Bishop of Reggio Emilia by Marco Antonio Gozzadini, Bishop of Recanati with Raffaele Inviziati, Bishop Emeritus of Cefalonia e Zante, and Giulio Sansedoni, Bishop Emeritus of Grosseto, serving as co-consecrators.

Catholic Church titles
Preceded byGiovanni Battista DetiCardinal-Deacon of Sant'Adriano al Foro 1600Succeeded byGiovanni Doria
Preceded byAndreas von AustriaCardinal-Deacon of Santa Maria Nuova 1600–1621Succeeded byMaurizio di Savoia
Preceded byAndrea Baroni Peretti MontaltoCardinal-Deacon of Sant'Eustachio 1621Succeeded byMaurizio di Savoia
Preceded byAndrea Baroni Peretti MontaltoCardinal-Deacon of Santa Maria in Via Lata 1621–1623Succeeded byCarlo Emmanuele Pio di Savoia
Preceded byClaudio RangoniBishop of Reggio Emilia 1621–1624Succeeded byPaolo Coccapani
Preceded byGiacomo SerraCardinal-Priest of Santa Maria della Pace 1623–1624Succeeded byMelchior Klesl