- Hyden Marches: Comprising the surrounding foothills and lakes of the World's Edge Mountains. It is administered by House Lotheed, who serve as landgraves of the region.
- Porthmos Gap: A lesser prefecture within Porthmos, this area is a large plain sitting between two mountain ranges. While geographically part of Porthmos Prefecture, most of this area is administered by Grand Duke Avernathus.
- Sardis Township: Capital.
- Porthmos Prison: Formerly Edgeside Keep, this penitentiary is the personal prison of Grand Duke Thestro Briarsmith.3
- Mark Moreland. (2017). Taldor, the First Empire, p. 32–33. Paizo Inc. ISBN 978-1-60125-999-8
- Amber E. Scott. (2018). The Six-Legend Soul. The Six-Legend Soul, p. 8. Paizo Inc. ISBN 978-1-64078-052-1
- Patchen Mortimer. (2020). "Prisons of the Inner Sea". Belly of the Black Whale, p. 68. Paizo Inc. ISBN 978-1-64078-287-7