The Erdut Agreement (Serbo-Croatian: Erdutski sporazum / Ердутски споразум), officially the Basic Agreement on the Region of Eastern Slavonia, Baranja and Western Sirmium, was an agreement reached on 12 November 1995 between the authorities of the Republic of Croatia and the local Serb authorities of the Eastern Slavonia, Baranja and Western Syrmia region on the peaceful resolution to the Croatian War of Independence in eastern Croatia. It initiated the process of peaceful reintegration of the region to the central government control (implemented by the United Nations) and provided a set of guarantees on minority rights and refugee return. It was named after Erdut, the village in which it was signed.

The signers were Hrvoje Šarinić, the former prime minister of Croatia, and Milan Milanović, a local Serb politician representing the self-proclaimed Republic of Serbian Krajina (RSK) under instructions from the authorities of the Federal Republic of Yugoslavia. The witnesses were Peter Galbraith, the ambassador of the United States to Croatia at the time, and Thorvald Stoltenberg, the United Nations intermediary.The territory of Eastern Slavonia, Baranja and Western Sirmium had previously been controlled by the RSK, and before that by the SAO Eastern Slavonia, Baranja and Western Syrmia. The agreement was acknowledged by the United Nations Security Council Resolution 1023, and it paved the way to the establishment of the United Nations Transitional Authority for Eastern Slavonia, Baranja and Western Sirmium. UNTAES was not designed as an ordinary UN mission but rather as a transitional administration, partially modeled on the United Nations Transitional Authority in Cambodia, therefore providing the UNTAES with a direct and supreme governing mandate over the region which was an effective United Nations protectorate.