Laurence Tubiana (born 1951) is a French economist and diplomat. She was appointed French ambassador for international climate negotiations in connection with the 2015 COP21 Climate Change Conference in Paris, and played a key role in facilitating the Paris Agreement on Climate Change.
She founded and has headed the Paris-based Institute of Sustainable Development and International Relations (IDDRI), and is a Professor and Director of the Sustainable Development Centre at the Paris high-level educational institution, Sciences Po. She previously served as senior adviser on the environment to the former French Prime Minister Lionel Jospin. She has been responsible for conducting international environmental negotiations for the French government, and has also been a member of the Economic Analysis Council (Conseil d'analyse economique) attached to the French Prime Minister's office.