The Princess Castle is a members-only land den. It was released in November 2010 and it is sold at the Den Shop.
It's default appearance has light pink walls and a lavender colored floor lined with light purple stars. It has five rooms, four floors and a medium sized garden making it spacious and large. The roof consists of pointy turrets which have flags protruding from the top.
- It is a bit smaller than the Fantasy Castle Den, but is still quite large compared to other dens.
- The Pet Princess Castle is an item that is based on this den.
- The Friendship Party has a layout that is based on this den.
- It was one of the first dens available, along with the Castle Den, Treehouse Den and Small House Den.
- There is a glitch where the player can get teleported to the top of the den.
- Unlike many other dens, there are no unique patterns for the wallpapers and floorings used on this den.