Girolamo Gastaldi (1616–1685) was a Roman Catholic cardinal.^[1]

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On 12 May 1680, was consecrated bishop by Girolamo Boncompagni, Archbishop of Bologna, with Carlo Molza, Bishop of Modena, and Augusto Bellincini, Bishop of Reggio Emilia, serving as co-consecrators.^[1][2]

He is known for his treatise on the political and legal measures taken to control the plague, Tractatus de Avertenda et Profliganda Peste, Politico-Legalis, published in 1656.^[3]