Adolfo Aguilar Zínser (born 2 December 1949) is a Mexican politician.
Born in Mexico City, Aguilar Zínser studied international relations at El Colegio de México (1972-75) and completed a master's degree in international and public affairs at Harvard University's Kennedy School of Government (1977-78).
Elected to the Chamber of Deputies for the Party of the Democratic Revolution (PRD) in 1994, he served there until 1997. From 1997 to 2000 he served in the Senate, as a senator for the Green Ecological Party of Mexico (PVEM).
Following Vicente Fox's election to the Presidency (representing a coalition of the National Action Party (PAN) and the PVEM) on 2 July 2000, Aguilar Zínser served as the transition team's advisor on international affairs. After taking office, Fox appointed Aguilar Zínser his national security advisor.
In January 2002, Fox appointed Aguilar Zínser Mexico's permanent representative to the United Nations. His term coincided with Mexico's election to the Security Council and, in accordance with the Security Council's rules of procedure, he served as its president for two one-month terms.
Following a speech to students at Mexico City's Ibero-American University on 11 November 2003, in which Aguilar Zínser claimed that the political and intellectual class of the United States sees Mexico as "a country whose position is that of a back yard" and that Washington was only interested in "a relationship of convenience and subordination", it was announced, on 18 November, that he would be leaving his post at the UN. Originally scheduled for 1 January 2004, to enable him to complete the entirety of Mexico's Security Council stint, he abruptly announced his resignation with immediate effect on 20 November.
