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Welcome to Oxford Public International Law

Oxford Public International Law (OPIL) is a comprehensive, single location providing integrated access across our international law services, bringing you one step closer to the perfect research solution.

Our ground-breaking online resources work to speed up research and provide easy access to authoritative content, essential for anyone working in international law.

Showcase at 2022 ESIL conference

As part of OUP’s showcase for the 17th Annual Conference of the European Society of International Law, a collection of articles from the Max Planck Encyclopedia of Public International Law (MPEPIL) and the Max Planck Encyclopedia of International Procedural Law (MPEiPro) has been made freely available for you to explore. These have been informed by this year’s theme the ‘In/Ex-clusiveness of International Law’. Find out more here.


Site News

October 7, 2022

October MPEiPro Update

Eight new articles have been added to the Max Planck Encyclopedia of International Procedural Law.

October 3, 2022

Case reports from w/c 26 September 2022

This month ORIL published 3 new articles. 

September 30, 2022

September 2022 OEEUL Update

Nine new and one updated articles have been added to the Oxford Encyclopedia of EU Law.

September 30, 2022

New Oxford International Organizations Headnotes - September 2022

2 new headnotes have been added to Oxford International Organizations.