Philip Nettre Lilienthal (1850–1908) was an American banker and philanthropist.

He served as a director of the California Title Insurance & Trust Company of San Francisco, the San Francisco Free Library, Union Iron Works, and was President of the Philharmonic Society.

[1] He co-founded the Russian Jewish Alliance with Rabbi Jacob Voorsanger which assisted Jews who had fled Russia for the United States.

[1] Philip Nettre Lilienthal was born to a Jewish family in New York City in 1850, the son of Babette "Pepi" Nettre (born 1821) and Max Lilienthal, a leading Rabbi in Reform Judaism.

[1] At the age of 14, he worked for Stix, Krause & Co. and at the age of 17, moved to New York City where he worked for James and Joseph Seligman at J.