HRL

HRL may refer to:
 * HRL (software), an artificial intelligence program
 * HRL Laboratories, formerly Hughes Research Laboratories, in Malibu, California, United States
 * Harlech railway station, in Wales
 * Hilandar Research Library, at Ohio State University
 * IBM Haifa Research Laboratory, in Haifa, Israel
 * Valley International Airport, serving Harlingen, Texas, United States