Richard Gerald Anthonisz, ISO, JP (22 October 1852 – 3 January 1930) was a Ceylonese lawyer, educationist and civil servant.
Entering the field of law Anthonisz became a Proctor of the District Court.
He thereafter became a teacher and served as the Head Master at Richmond College, Galle and at the Colombo Academy; before becoming the head master of the English Galle Central School.
A keen student of Dutch history and culture in Ceylon, in July 1899 Anthonisz was appointed to the new post of Examiner of Dutch Records, with the task of searching and organizing the scattered records and documents of the Dutch administration.
With successful archive process of Dutch records, a new post of Government Archivist and Librarian was created by the British administration as part of the Chief Secretaries Office (also known as the Colonial Secretary) in 1902 and Anthonisz was made a permanent appointment.