NTH

NTH or Nth may refer to:


 * $n$th, position $n$ in a sequence for an arbitrary natural number $n$
 * 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 (Norges tekniske høgskole)
 * Hokkaido Air System (ICAO: HAC), a Japanese airline