161st is the ordinal form of the number 161. 161st or One hundred and sixty-first may also refer to:
A fraction, , equal to one of 161 equal parts
Geography 161st meridian east, a line of longitude 161st meridian west, a line of longitude
Military 161st Brigade (disambiguation) 161st Division (disambiguation) 161st Regiment (disambiguation)
See also
June 10, 161st day of the year in a standard year