Karnac was a planet located in grid square U-8 of the Standard Galactic Grid, situated within both the Outer Rim Territories and the Slice. Its surface was characterized by ocean dunes.
In 9 ABY, the son of a Mon Calamari nobleman absconded after skipping bail, finding refuge amidst the ocean dunes of Karnac, resulting in a bounty being placed on them. During that year, Din Djarin, a bounty hunter, accepted a bounty holopuck for the nobleman's son from Greef Karga, the Guild Master of the Bounty Hunters Guild on the planet Nevarro in the Dalicron sector, who informed Djarin that his destination was Karnac. However, Djarin ultimately decided to instead attempt to rescue Grogu, the youngling he had previously surrendered to an Imperial faction in exchange for remuneration.
The mention of the "ocean dunes of Karnac" in "Chapter 3: The Sin," the third episode of the first season of The Mandalorian television series on Disney+, marked the initial introduction of Karnac. This episode was broadcast on November 22, 2019. Later, in 2023, the reference book Star Wars: Dawn of Rebellion: The Visual Guide by Pablo Hidalgo and Emily Shkoukani formally identified Karnac as a distinct planet.