Timoleon Raimondi (5 May 1827 – 27 September 1894) (Chinese: 高雷門) was the Last Prefect and First Vicar Apostolic of Hong Kong (17 November 1874).

Raimondi was born in Milan, Italy. He was the younger brother of Antonio Raimondi, a prominent naturalist who worked in Peru. Timoleon was ordained as a priest on 25 May 1850. He was appointed as prefect of Hong Kong in Hong Kong on 27 December 1868.

Raimondi was also:

• Titular Bishop of Achantus and Hong Kong – 4 October 1874
• Titular Bishop of Achantus – 22 November 1874

He died in Hong Kong on 27 September 1894.

Raimondi College in the Mid-Levels, Hong Kong Island was named after him.

• von Hübner, Joseph Alexander Graf (1874). A Ramble Round the World, 1871: Japan. Macmillan and Co, London; translated by Baroness Mary Elizabeth Herbert. pp. 373–378.

• Bishop Timoleone Raimondi, M.E.M. ^{[self-published]}