Tonnata was a star system in the Beta Quadrant. This system included the planet Tonnata VII.

In 2259, the location of this system was labeled on a stellar cartography chart that was seen on the USS Enterprise's ready room viewscreen. This system's symbol was a red Klingon Empire logo, indicating its affiliation with the empire. (SNW: "Strange New Worlds", "Children of the Comet", "Spock Amok")

On stardate 1292.4, the location of this system was labeled in a chart used during a Section 31 Alpha Team briefing. It was marked as a Klingon world. (Star Trek: Section 31)

In 2399, the location of Tonnata was labeled on a Federation star chart that was in Fleet Admiral Kirsten Clancy's office at Starfleet Headquarters. This system was in or near to Klingon space. (PIC: "Maps and Legends")