Sigma Draconis III
Class:	M
Type:	Planet
Native Species:	Sigma Draconis III natives
Location:	Sigma Draconis system

Sigma Draconis III was the third planet in the Sigma Draconis system. It was a moonless M-class planet, larger and more heavily populated than Sigma Draconis IV. By 2268, the planet's inhabitants had a pre-spaceflight culture with an industrial scale rating of B, which was equivalent to Earth in 1485, and a technological rating of 3. (TOS: "Spock's Brain")