Massassi may refer to:
- The , one of the largest rebel cells that fought against the Galactic Empire in the years prior to the Battle of Yavin.
- , warriors of the Massassi that served the Sith LordNaga Sadow.
- , a region of Yavin 4 that contained several ancient monuments built by Massassi.
- , a location on Yavin 4.
- The (also known as the ), the headquarters of the Alliance to Restore the Republic early in the Galactic Civil War.
- , an extinct species that built stone temples on Yavin 4.
- , a type of crystal that was an artifact of the ancient Ordu Aspectu, a splinter group of the Jedi Order.
- , purple-barked giant trees that grew on Yavin 4.
- , a region of Yavin 4 that contained several Sith Temples.
- , a fighting arena on Yavin 4.
- , various temples on Yavin 4.
- , an island on Yavin 4.
- , a settlement of the Massassi on Yavin 4 near the Temple of Sacrifice.
- , a stone viaduct in the Massassi Site on Yavin 4.
- , a monument located north of the Massassi Site on Yavin 4.
- , a temple on Yavin 4.
- The (also known as the ), a temple on Yavin 4 for the worship of Naga Sadow.
- , a subspecies of Sith that comprised the warrior class in the Sith caste system.
- , a language spoken by the Massassi.
- , a primitive version of the lanvarok used by the Massassi.
- , a purple-barked tree native to Yavin 4.
- , a four-bladed melee weapon used for close combat.
- , a sword once used by the Massassi.
- , a melee weapon once used by the Massassi.
- , a rifle once used by the Massassi.
- , a sword once used by the Massassi.
- , a blaster carbine used during the time of the Galactic Civil War.
- , a type of light armor suit that was used by the Massassi.
- , a call sign used by the Rebel Alliance after the Battle of Yavin.
- , a type of tea brewed from the blossoms of the Massassi tree.
- , engraved tablets written by the Massassi to cover their history.
- , a mission undertaken by Mas Amedda on Yavin 4.