61st is the ordinal form of the number 61st. 61st or Sixty-first may also refer to:
A fraction, , equal to one of 61 equal parts
Geography 61st meridian east, a line of longitude 61st meridian west, a line of longitude 61st parallel north, a circle of latitude 61st parallel south, a circle of latitude 61st Street (disambiguation)
Military 61st Army 61st Brigade (disambiguation) 61st Division (disambiguation) 61st Regiment (disambiguation) 61st Squadron (disambiguation)
Other 61st century 61st century BC
See also 61 (disambiguation)