HPD

HPD may refer to:
 * 4-Hydroxyphenylpyruvate dioxygenase
 * Hematoporphyrin, organic compound
 * Histrionic personality disorder
 * Honda Performance Development
 * HPD series of mines, landmines
 * New York City Department of Housing Preservation and Development
 * Croatian Climbing Society (Hrvatsko planinarsko društvo, HPD)

Transport

 * Haripad railway station, Kerala, India
 * Haripur Band railway station, Punjab, Pakistan
 * Harpenden railway station, Hertfordshire, England (National Rail station code)

US police departments

 * Hagerstown Police Department (Maryland)
 * Hempstead Village Police Department, in New York
 * Henderson Police Department in Nevada
 * Hialeah Police Department, in Florida
 * Hillsboro Police Department (Oregon)
 * Hollywood Police Department (Florida)
 * Holyoke Police Department, in Massachusetts
 * Honolulu Police Department in Hawaii
 * Hoonah Police Department, in Alaska
 * Houston Police Department in Texas