| Name | 
Source | 
Type
 | 
| Wadi | 
Star Trek | 
 | 
| Waldahudin | 
Robert J. Sawyer's Starplex | 
 | 
| Wanderers | 
Noon Universe | 
 | 
| Wang's Carpets | 
Greg Egan's Diaspora | 
 | 
| Wankh | 
Jack Vance's Planet of Adventure series | 
Black frog-like humanoids
 | 
| Warren Ampersand | 
Adventure Time | 
A blue shapeshifting alien and Jake's father.
 | 
| The Watcher | 
Marvel Comics | 
 | 
| Waterseekers | 
Red Planet | 
 | 
| Weeping Angels | 
Doctor Who | 
Statue-like humanoid
 | 
| Weevils | 
Torchwood | 
Humanoid
 | 
| Whrloo | 
Larry Niven's Known Space | 
 | 
| Willis the Bouncer | 
Red Planet | 
 | 
| Winathians | 
DC Comics' Legion of Super-Heroes | 
A humanoid species from the planet Winath. They do not normally possess powers, with Garth Ranzz and Ayla Ranzz being metahumans with electric abilities.
 | 
| Wirrn | 
Doctor Who | 
 | 
| Wisps | 
Sonic the Hedgehog | 
Squid-like creatures of various shapes and colors
 | 
| Wogneer | 
Star Trek | 
 | 
| Wolfweeds | 
Doctor Who | 
 | 
| Wookiees | 
Star Wars | 
Humanoid
 | 
| Wraith | 
Stargate | 
The wraith looks like a human; the difference is the grey skin, the long hair of all of them, and some little holes in the face.
 | 
| W'rkncacnter | 
Marathon Trilogy | 
 |