85th is the ordinal form of the number 85. 85th or Eighty-fifth may also refer to:
A fraction, , equal to one of 85 equal parts
Geography 85th meridian east, a line of longitude 85th meridian west, a line of longitude 85th parallel north, a circle of latitude 85th parallel south, a circle of latitude 85th Street
Military 85th Brigade (disambiguation) 85th Division (disambiguation) 85th Regiment (disambiguation)
Other 85th century 85th century BC
See also 85 (disambiguation)