Carlos Westendorp y Cabeza is a Spanish diplomat and former politician. He is the former Minister of Foreign Affairs and also served as High Representative for Bosnia and Herzegovina succeeding Carl Bildt and was powered with upholding the Dayton Peace Agreement.

The High Representative for Bosnia and Herzegovina, together with the Office of the High Representative (OHR) in Bosnia and Herzegovina, were created in 1995 immediately after the signing of the Dayton Agreement which ended the 1992–1995 Bosnian War. The purpose of the High Representative and the OHR is to oversee the civilian implementation of the Dayton agreement. They also serve to represent the countries involved in the implementation of the Dayton Agreement through the Peace Implementation Council (PIC), which chooses the High Representative.