Theodore Hamberg (Chinese: 韓山明 or 韓山文) (25 March 1819 – 13 May 1854) was a Swedish missionary and author active in China.

He began working in the office of British consul George Foy and maintained a close relationship with the family.

[1] Hamberg's conversion came in 1842 through the preaching of Pietist revivalist preacher Carl Olof Rosenius, whom he became close friends with and introduced to Mathilda.

After the death of Gützlaff, Hamberg was vindicated and he continued to work under the Basel Mission.

The book was the first extensive account on the Taiping rebellion in a Western language and remains an important source on the early life of Hong Xiuquan.