Agostino Marchetto (born 28 August 1940) is an Italian prelate of the Catholic Church who worked in the diplomatic service of the Holy See from 1968 to 1999 and then in the Roman Curia until his retirement in 2010.

[2] He entered the diplomatic service of the Holy See in 1968 and worked in the offices of the papal representative to Zambia, Cuba, Algeria, Portugal, and Mozambique.

[1] On 8 July 1999, Pope John Paul appointed him Permanent Observer of the Holy See to the international food and agriculture organizations based in Rome: FAO, IFAD, PAM, and CMA.

In 2006, Marchetto tied the World Cup in Germany to human trafficking for prostitution, giving “some 'red cards' ... to this industry, to its clients", and the host country.

He denounced the Sarkozy government in France for expelling Roma people en masse, assigning collective guilt and ignoring individual responsibility.