The Sarlacc (plural Sarlacci) is a fictional creature in George Lucas's sci-fi action saga Star Wars. It first appeared in the film Return of the Jedi (1983) as a multi-tentacled alien beast whose immense, gaping maw is lined with several rows of sharp teeth, inhabiting the Great Pit of Carkoon, a hollow in the sand of the desert planet Tatooine. After the bounty hunter Boba Fett escapes from its maw in "Chapter 1: Stranger in a Strange Land" of The Book of Boba Fett (2022) and eventually returns to retrieve his armor, the Sarlacc is killed by his partner Fennec Shand in "Chapter 4: The Gathering Storm".

In the original Return of the Jedi, the Sarlacc is depicted as a barbed gaping mouth in the desert sand with tentacles. The 1997 Special Edition of the film added computer-generated tentacles and a beak to the mouth, which has remained its canonical depiction since. Besides Return of the Jedi, the creature and others like it are featured in Star Wars literature.

Like other aspects of Star Wars, the Sarlacc became a part of popular culture. The creature was incorporated into the merchandising campaign that accompanied the release of Return of the Jedi. It is the subject of analysis and humor in works of literature unassociated with Star Wars.

The Sarlacc first appeared in the 1983 film Return of the Jedi, wherein Jabba the Hutt attempts to drop Luke Skywalker, Han Solo, and Chewbacca into the creature's mouth; but Luke frees himself and the others with the aid of Lando Calrissian and R2-D2, while Princess Leia strangles Jabba.

According to the Star Wars Databank, the Sarlacci inhabit remote, inhospitable locations in the galaxy, but defy taxonomic classification, insofar as most texts claim that the Sarlacc is an arthropod (as in The Essential Guide to Alien Species and The Wildlife of Star Wars), while its anchored root system and spore-based method of reproduction suggest a plant origin. A Sarlacc reproduces by releasing spores through outer space, which arrive on a planet or asteroid, and there excavate a pit to capture prey.

Steve Sansweet's Star Wars Encyclopedia describes the Sarlacc as an "omnivorous, multi-tentacled creature with needle-sharp teeth and a large beak". The Sarlacc rests at the base of a giant pit where the entirety of its body is buried except for the gaping mouth, which may reach three meters (10 feet) in diameter. The Sarlacc uses its four legs to anchor itself underground. Astrophysicist and science fiction author Jeanne Cavelos compares the Sarlacc's hunting method to that of the antlion. The Sarlacc's mouth also has similarities with that of the lamprey.

Because most Sarlacci inhabit isolated environments and rely on prey to stumble into their pit, they rarely feed; the digestive system dissolves prey into nutrients over a period of several thousand years. If no living prey is available, a Sarlacc relies on its root system to absorb nutrients. One Sarlacc located on an airless moon feeds on cometary material rich in oxygen, hydrogen, carbon, and nitrogen.

The Sarlacc's stomach is lined with vessels that attach themselves to a swallowed victim and maws for quick digestion or breaking apart of large prey. The maws close when exposed to bright lights. The stomach also contains neurotoxins, which induce hallucinations in prey which "suggest that the Sarlacc somehow absorbs the intelligence of all its victims, who live on in disembodied torment". A Sarlacc can communicate with its victims through this stolen consciousness: In one Star Wars short story, an unnamed Jedi explains that "Sarlacci do interesting things with messenger RNA: over the course of millennia, they can attain a sort of group consciousness, built out of the remains of people they've digested. I talked to such a Sarlacc, once a few decades ago".