NTH or Nth may refer to:
- th, position in a sequence for an arbitrary natural number
- Nth (trigraph)
- Neath railway station, Neath Port Talbot, Wales, National Rail station code
- North
- Northamptonshire, county in England, Chapman code
- Northumberland, England
- Norwegian Institute of Technology ()
- Hokkaido Air System (ICAO: HAC), a Japanese airline
See also
- Nth Man
- The Nth Degree (disambiguation)
- Anth (disambiguation)