Orcs - Low population race, prone to mutation. Their large size makes getting enough food for a larger settlement impossible.
Gnomes - These little guys are great artificers and tinkerers
Lizard Folk - Enigmatic, quiet, inscrutable. There are several enclaves of these throughout the world.
Tieflings - A long-ago nation of humans made a pact with an old evil. They used to be viewed with suspicion but for the most part changing circumstances have altered that.