Francis Preserved Leavenworth

Francis Preserved Leavenworth (born September 3, 1858 in Mount Vernon, Indiana; died November 12, 1928; a.k.a. Frank Leavenworth) was an American astronomer. He discovered many New General Catalogue objects together with Frank Muller and Ormond Stone. They used a telescope with a 66-cm aperture at the Leander McCormick Observatory at the University of Virginia in Charlottesville, Virginia.

He was a member of the Camden Astronomical Society shortly after its founding in 1888.

In 1909 he joined Frederick C. Leonard's Society for Practical Astronomy.