Adalberto Martínez Flores (born 8 July 1951) is a Paraguayan prelate of the Catholic Church who was named as the Archbishop of Asunción in 2022.

He received his episcopal consecration on 8 November[2] from Felipe Santiago Benitez Avalos, Archbishop of Asunción.

[3] On 19 February 2007, he was transferred to the Diocese of San Pedro and on 14 March 2012 appointed to the Military Ordinariate of Paraguay.

On 23 July 2018, he was transferred to Villarrica del Espíritu Santo while continuing as apostolic administrator of the Military Ordinariate.

[4] On 27 August 2022, Pope Francis made him a cardinal priest, assigning him the title of San Giovanni a Porta Latina.