The nine realms have countless races that inhabit it, however there here are the most prominent.
Jotun: offspring created from the original Jotun Ymirr. There are several clans within the jotun race, each clan is vastly different in appearance and behavior from each other, slowly they have been pushed deeper, and deeper into Jotunhiem by Asguard.
Asguardian: humanoid in appearance, increased strength, speed, and a talent for magic. They have intermixed with the dying out jotun race. Occasionally a child will be born with jotun powers or abilities.
Dragon: ancient, cold hearted, greedy reptiles, they make excellent merchants, or stewards.
Elf: Longlived, disconnected from the world, they make excellent druids, and sages.