Sixteenth or 16th may refer to:

The ordinal form of the number 16 A fraction, , equal to one of 16 equal parts Sixteenth of the month, a recurring calendar date Sixteenth note, a note played for half the duration of an eighth note 16th birthday, the age of majority in several countries Sweet Sixteenth birthday celebration event

Geography 16th meridian east, a line of longitude 16th meridian west, a line of longitude 16th parallel north, a circle of latitude 16th parallel south, a circle of latitude 16th Avenue (disambiguation) 16th Street (disambiguation)

Military 16th Army (disambiguation) 16th Battalion (disambiguation) 16th Brigade (disambiguation) 16th Division (disambiguation) 16th Regiment (disambiguation) 16th Squadron (disambiguation)

Others Sixteenth Amendment (disambiguation) Sixteenth Amendment to the United States Constitution 16th century 16th century BC

See also 16 (disambiguation)