This is perhaps one of the most useful fantasy tools I’ve run across in a long time. I’m just sorry that I didn’t have it for last year’s ‘World Building Month’ event.
Medieval Demographics Made Easy, by S. John Ross.
“Numbers for Fantasy Worlds.”
Basically, this page discusses how many people can fit onto so much land– medieval population density, how big a town must be to support certain occupations, and how this all pertains to world building and specifically, gaming or writing in a fantasy setting. For anyone who ever wanted to add realism in an economical set-up, this is for you.