Nathaniel Borradaile Browne (1819-1875) was a lawyer, financier, and government official in Philadelphia, Pennsylvania.
Born in Philadelphia, he helped found the Fidelity Trust Company in 1866 and worked on the 1876 Centennial Exposition in Fairmount Park. He represented a Philadelphia district in the Pennsylvania state legislature and was appointed Postmaster of Philadelphia on March 30, 1859.
His papers are today preserved at the University of Delaware in Newark, Delaware.