OHP may refer to:

• Haute-Provence Observatory (French: Observatoire de Haute-Provence), an astronomical observatory in the southeast of France
• Occupational health psychology, an interdisciplinary area of psychology that is concerned with the health and safety of workers
• Oklahoma Highway Patrol, a major state law enforcement agency of the government of Oklahoma
• Open House Party, an American radio show hosted on Saturday and Sunday nights by Kannon
• Open Humanities Press, an international open access publishing initiative in the humanities
• Order of the Holy Paraclete, an Anglican religious community
• Oregon Health Plan, Oregon's state Medicaid program
• Overall hemostatic potential, a global test of coagulation and fibrinolysis
• Overhead press, a weight training exercise with many variations
• Overhead projector, a device that uses light to project an enlarged image on a screen
• Oliver Hazard Perry-class Frigate, a class of guided missile frigates that were designed by US in mid-70s.
• Overhead Pole, an above ground pole used to support span wires for a tram network.