Pes (Latin for "foot") or the acronym PES may refer to:

• Pes (unit), a Roman unit of length measurement roughly corresponding with a foot
• Pes or podatus, a Neume § Neumes representing two notes
• Pes (rural locality), several rural localities in Russia
• Pes (river), a river in northwestern Russia
• Pes (anatomy), zoological term for the distal portion of the hind limb of tetrapod animals
  • Talipes equinovarus (pes equinovarus), clubfoot
  • Talipes cavus (pes cavus), clawfoot
  • Talipes planus (pes planus), flat feet
  • Talipes valgus (pes valgus), valgus deformity of the foot
  • Talipes varus (pes varus), varus deformity of the foot
  • Pes anserinus (leg)
  • Pes anserine bursitis, inflammatory of the inner knee at the bursa of the pes anserinus
  • Parotid plexus, pes anserinus of the facial nerve

• PES University, formerly P.E.S. Institute of Technology, a university in Bangalore, India
• Providence Elementary School, an elementary school in Chesterfield County, Virginia

• Pro Evolution Soccer, a multi-platform video game series developed by Konami
• Packetized elementary stream, part of the MPEG communication protocol
• Peripheral Event System, an implementation of autonomous peripheral operations in microcontrollers
• PSTN Emulation System for IP Multimedia Subsystem (IMS)

• Postal Express Service, United States military mail during World War I
• Power Engineering Society, now the Power & Energy Society of the Institute of Electrical and Electronics Engineers
• Premier Election Solutions, formerly Diebold Election Systems
• Party of European Socialists, a centre-left pan-European political party
• Social Encounter Party, a Mexican former political party
• Solidarity Encounter Party, a Mexican former political party
• Philadelphia Energy Solutions, the corporate owner of the refinery involved in the 2019 Philadelphia refinery explosion

• Pallasite Eagle Station, a pallasite meteorite grouplet
• Photoemission spectroscopy or Photoelectron spectroscopy, a measurement of a substance's binding energy using the photoelectric effect
• Poly(ethylene succinate), a type of polyester
• Polyester, an artificially produced organic chemical that is spun and woven to make fabric
• Polyethersulfone, a thermoplastic polymer
• Potential energy surface, in physics and chemistry
• Programmed electrical stimulation, a type of electrophysiologic study
• Pseudoexfoliation syndrome, an eye problem

• PES (director) (born 1973), film director and animator born Adam Pesapane
• Passenger Environment Survey, quality-control system for transit systems
• Payment for ecosystem services, incentives offered to farmers or landowners
• Pensarn railway station, Gwynedd, Wales, by National Rail station code
• Price elasticity of supply, a measure used in economics
• Public employment services in the European Union
• PULHHEEMS, a system of grading physical and mental fitness used by Britain's armed forces

• Pez (disambiguation)