38th is the ordinal form of the number 38. 38th or Thirty-eighth may also refer to:
A fraction, , equal to one of 38 equal parts
Geography 38th meridian east, a line of longitude 38th meridian west, a line of longitude 38th parallel north, a circle of latitude 38th parallel south, a circle of latitude 38th Street (disambiguation)
Military 38th Army (disambiguation) 38th Brigade (disambiguation) 38th Division (disambiguation) 38th Regiment (disambiguation) 38th Squadron (disambiguation)
Other 38th century 38th century BC
See also 38 (disambiguation)