Paul Leidy (November 13, 1813 – September 11, 1877) was a Democratic member of the U.S. House of Representatives from Pennsylvania, serving one term from 1857 to 1859.

He taught school in Danville, Pennsylvania, for several years beginning sometime around 1838 while also pursuing additional studies in law.

His obituary states that, "He applied himself diligently to his chosen profession and built up a lucrative practice."

Leidy was elected as a Democrat to the Thirty-fifth Congress to fill the vacancy caused by the death of John G. Montgomery.

During his term, congress was involved in the dispute regarding the admission of Kansas as a state, a topic on which Leidy addressed the House (30 March 1858).