Ferrisville was one of the smaller urban settlements on Yellowstone, other than Chasm City itself. It was named in honour of Marco Ferris, pioneer of Yellowstone colonisation and something of a historical and legendary figure to the Yellowstone Demarchists.
H also notes that Ferrisville was Yellowstone's second largest city, but despite this, it was nowhere near as populous as the planet's more famous capital:
Yellowstone had only a handful of settlements even a tenth the size of Chasm City now; nothing equalling it. Even the second largest city, Ferrisville, was a township compared to the capital.
-excerpt from chapter Thirteen of Chasm City 
The city was known to implement the Ferrisville Convention, concerning spacecraft traffic regulations over Yellowstone.
The city's law enforcement included a "Ferrisville constabulary", but it is unclear whether this had anything to do with the Panoply or was an entirely different and purely local police force.
Ferrisville is mentioned fairly often in various Revelation Space series stories, but never directly visited.
- Due to the pronunciation of the city's name in English and French, the name of the city seems to be a bit of a pun on the term Ferris wheel.