Juan Hernández López (March 1859 – May 17, 1944) was a Puerto Rican politician, senator, and attorney.
He joined the Autonomist Party with Román Baldorioty de Castro, and served as one of its secretaries and co-author of its program in 1887.
Hernández collaborated with the newspaper El Clamor del País and defended journalists that were persecuted for political reasons.
He was vocal in the Commission organized to review the laws of Puerto Rico upon the installation of the Foraker Act in 1900.
After finishing his last term in 1932, Hernández retired from politics to dedicate to his private law practice until his death.