Alessandro Tiarini (20 March 1577 – 8 February 1668) was an Italian Baroque painter of the Bolognese School.

Forced to flee from Bologna, due to what Malvasia and Amorini describe as a quarrel leading to the death of the other party, he moved to Florence, where he painted frescoes, façade decorations, and altarpieces (1599–1606) including an Adoration of the Shepherds (Pitti Palace).

He painted a series of frescoes for the Brami Chapel in the sanctuary, as well as other works, for the Basilica della Ghiara in Reggio Emilia.

He also painted the Raising of the Cross for the Oratorio della Buona Morte in Reggio, a work now displayed in the Galleria Estense of Modena and Judith and Holofernes for the church of Santa Maria di Canepanova in Pavia.

[2] He painted a Virgin, Mary Magdalene, and St John, weeping over the instruments of the Passion for church of S. Benedetto; St. Catherine kneeling before a Crucifix for Santa Maria Maddalena; a Pietà for Sant'Antonio; and St Dominic resurrecting a child for the church of San Domenico.