Rakonian swamp rats were a type of rat.

In 2372, Major Kira Nerys said that Quark had more in common with Rakonian swamp rats than with Lieutenant Commander Worf. (DS9: "Hippocratic Oath")

According to Star Trek: Star Charts (p. 47) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), there was a star system named Rakon (39 Tauri), which might possibly be the system of origin for this species, in the Alpha Quadrant. The system's primary was a G-class star. In the late 24th century, it was an independent system.