International law in Australia is a significant field that deals with the rules and principles governing the relationships between nations, as well as the rights and duties of states in the international community. This area of law encompasses various disciplines, including public international law, private international law, and international humanitarian law. Australia is a party to numerous international treaties and conventions, which influence its domestic legal system and guide its foreign policy and diplomatic engagements.

Key areas of international law include treaty law, international human rights, international trade and investment, international environmental law, and the laws of war. Public international law focuses on the relationships between sovereign states and international organizations, while private international law addresses conflicts of laws and jurisdictional issues in cross-border disputes. International humanitarian law, also known as the laws of armed conflict, regulates the conduct of armed forces and the protection of civilians during conflicts.

Recent developments in international law reflect the dynamic and interconnected nature of global issues. Topics such as climate change, cybersecurity, international terrorism, and human rights abuses are increasingly prominent on the international legal agenda. Australia's participation in international bodies, such as the United Nations, World Trade Organization, and International Criminal Court, underscores its commitment to upholding international legal standards and contributing to global governance.