The geography of Zerith is conventionally divided into three regions (eastern, central and western), influenced by the presence of major mountain systems that run more or less north to south. Western Zerith is thought of as the area west of the Iron Mountains (in the north) and the Starkspit Mountains (in the south). Eastern Zerith is the region east of the Rustung Mountains, which leaves Central Zerith as the area between the Iron and Rustung Mountains.
By region, the major nations of Zerith are:
- Western Zerith
- Central Zerith
- Eastern Zerith