I use 17th-century York as the bechmark for my "epic" city capacity estimate - a title held only by Light's Reach and the Market District (known as Trademeet for the time being) - and then go from there. So, 10,000 for the epic cities. We assume that the next largest city - Hawk's Aerie - is half the size of Light's Reach/Trademeet, so we get a dirty estimate of 5000 for cities of that size. From that point we get 2500 for Medium Townships, 1000 for Small Townships, and 500 for Tiny Town(e)ships. From that dirty fantasy estimate, we get the following for Fastheld's Urban Population: