NH may refer to

  • National Hose Thread, a threaded connection standard used on hose couplings
  • New Hampshire, a state within the United States of America
  • Nh (digraph), an orthographic concept
  • NH Hoteles, a Spanish-based hotel chain
  • All Nippon Airways, an airline, formerly Nippon Helicopter
  • National Highway, a road designation in many countries
  • NetHack, a computer game
  • New York, New Haven and Hartford Railroad
  • Nishan-e-Haider, a Pakistani military award
  • Nordsjælland Håndbold, a Danish handball team
  • New Haven, a city within the State of Connecticut
  • Nickel hydride, a type of rechargeable battery
  • Interstellar nitrogen monohydride, the NH molecule detected in outer space
  • No-hitter, a baseball term
  • Noord-Holland, a province in Netherlands