Dorothy may refer to:
- Dorothy (given name), a given name (and list of people with that name)
- Dorothy (opera), a comic opera
- Dorothy (comic book), a comic book based on the Wizard of Oz
- DOROTHY, a device used to study tornadoes in the movie Twister
- USS Dorothy (SP-1289), a United States Navy patrol boat in commission from 1917 to 1918
- ST Dorothy, A Malaysian tug in service 1958-75
In characters:
- Dorothy (MÄR), a main character in MÄR
- Dorothy Gale or Dorothy, protagonist of The Wonderful Wizard of Oz by L. Frank Baum
- Ace (Doctor Who) or Dorothy, a character played by Sophie Aldred in Doctor Who
- Dorothy, a goldfish on Sesame Street owned by Elmo
- Dorothy the Dinosaur, a costumed dinosaur who appears with The Wiggles