Brioni Agreement may refer to:

• Brioni Agreement (1942) concluded between Croatia, Germany, Italy and Hungary on 10 August 1942, concerning reorganisation of the Danube–Sava–Adriatic Railway Company
• Brioni Declaration (1956), also known as Brioni Agreement, issued at the Brioni Meeting by heads of governments of India, Egypt and Yugoslavia in 1956, forming a basis for the Non-Aligned Movement
• Brioni Agreement or Brioni Declaration concluded between leaderships of Croatia, Slovenia and Yugoslavia on 7 July 1991, sponsored by the European Community