Mauro Lalli (born 17 September 1965) is an Italian prelate of the Catholic Church who works in the diplomatic service of the Holy See.

He was ordained a priest for the Roman Catholic Archdiocese of Chieti-Vasto on 14 July 1990.

He entered the Diplomatic Service of the Holy See on 1 July 1999 and subsequently worked in the Papal Representations in Guatemala, the Democratic Republic of the Congo, Mozambique, Romania, Croatia, India, Iraq, Jordan and Cyprus.

On 1 March 2024, Pope Francis appointed him Titular Archbishop of Pausula and Apostolic Nuncio to Papua New Guinea.

[4] On 15 January 2025, he was replaced by Maurizio Bravi as nuncio to Papua New Guinea and the Solomon Islands.