According to Memory Alpha, there are multiple canon mentions of Rigel and its planets from early TOS through ENT, and it included up to 12 planets and several colonies, with humans, the Kalar ("The Menagerie"), "Hill People" ("Wolf in the Fold"), and Rigellians (DS9 "Vortex," ENT "United," et.al.), who share physiology with Vulcans and Romulans.
The SFB source material has a slightly different race of Rigellians.