Ninth or 9th may refer to:
Common uses The ordinal of 9 One ninth, , a fraction, one of nine equal parts of a whole Ninth of the month, a recurring calendar date Ninth grade, in education Ninth inning, the last regular period of play in a game of baseball
Music Ninth chord Ninth (interval) Curse of the ninth, superstition in classical music Symphony No. 9 (Beethoven) Ninth (Peter Murphy album), a 2011 album Ninth (The Gazette album), a 2011 album
Geography 9th meridian east, a line of longitude 9th meridian west, a line of longitude 9th parallel north, a circle of latitude 9th parallel south, a circle of latitude Ninth Avenue (disambiguation) Ninth Street (disambiguation)
Military Ninth Army (disambiguation) 9th Brigade (disambiguation) 9th Division (disambiguation) 9th Infantry (disambiguation) 9th Regiment (disambiguation) 9th Squadron (disambiguation)
See also 9 (disambiguation) 9e, French for 9th Nines (disambiguation) Number nine (disambiguation) Ninth Amendment (disambiguation) Ninth Amendment to the United States Constitution 9th century and 9th century BC Bottom of the 9th, 1996 video game Bottom of the 9th (film), 2019 drama film Ninth Doctor, incarnation of the Doctor in Doctor Who United States Court of Appeals for the Ninth Circuit