The National Security and Defense Council of Ukraine (NSDC; Ukrainian: Рада національної безпеки і оборони України, romanized: Rada natsionalnoyi bezpeky i oboroni Ukrayiny, RNBO or RNBOU) is the coordinating state body of the executive power under the President of Ukraine on issues of national security and defense.

[3] It is a state agency tasked with developing and coordinating a policy of national security on domestic and international matters in advising the President of Ukraine (currently Volodymyr Zelensky).

[3] As of December 2024, the council is headed by secretary Oleksandr Lytvynenko, who replaced Oleksiy Danilov on 26 March 2024.

In the absence of existing President of Ukraine, such as between elections, the acting chairman of the council is the Prime Minister.

If the President resigns, the Chairman of the Verkhovna Rada becomes the acting head of the National Security and Defense Council.