Ong Hok Ham (1 May 1933 – 30 August 2007) was an eminent Chinese Indonesian historian considered one of the leading experts on Indonesian history during the 19th century Dutch colonial rule. His particular area of knowledge centered on events in Java during the period, and he authored a number of works dealing with the subject. He was a regular contributor to the Indonesian magazine Tempo and a collection of his pieces for the magazine written between 1976 and 2001, Wahyu yang Hilang, Negeri yang Guncang (A Lost Mandate, an Agitated Country) was published in 2002.