Gyula Koi (Hungarian: [ˈɟulɒ ˈkoi]; born April 21, 1977, Budapest) is a Hungarian legal scholar and lecturer. His main research fields are administrative law, and theory of public administration. His Chinese name is Guo Yi.

Koi graduated in 2002 with a BA in public administration from the Corvinus University of Budapest, and an MA/JD in Law from University of Szeged in 2010. From 2007 to 2009, he studied sinology at Eötvös Loránd University. In 2014, he obtained a doctoral degree from Széchenyi István University (Győr), writing a thesis entitled 'Foreign influences in Hungarian Public Administration.' From 2002 to 2003, he was Head Librarian at the EU Documentation and Research Center in the Faculty of Law. From 2003 to 2005, he was Assistant Lecturer at Corvinus University of Budapest, Dept. of Public Administration. In 2005, he became Assistant Fellow at the Institute for Legal Studies of Center for Social Sciences, Hungarian Academy of Sciences. In 2014, he became Research Fellow at the institute. From 2005 to 2019 he worked at the Hungarian Parliament (Committee of Immunity), focusing on 'Code of Conduct for MPs'. From 2009, he became editor-in-chief of 'Jogi Tudósító' (Legal Correspondent). In 2012, he became Assistant Lecturer at National University of Public Service, Faculty of Public Administration, Institute for Public Law. In 2014, he became a lecturer at this university. From 2017, Dr. Koi is senior research fellow at NUPS. His published papers number more than 480. The number of his papers in Foreign Languages (Chinese, English, French, German, Serbian, Slovak and Ukrainian) are 35. Number of his citations is 508 to 105 publications.
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