78th is the ordinal form of the number 78. 78th or Seventy-eighth may also refer to:
- A fraction, 1⁄78, equal to one of 78 equal parts
Geography
- 78th meridian east, a line of longitude
- 78th meridian west, a line of longitude
- 78th parallel north, a circle of latitude
- 78th parallel south, a circle of latitude
- 78th Street (Manhattan)
Military
- 78th Group Army, People's Republic of China
- 78th Division (disambiguation)
- 78th Regiment (disambiguation)
- 78th Squadron (disambiguation)
Other
See also
- 78 (disambiguation)
- 78ers, a group of LGBTQ activists