What is the latest version of Settlers Catan board game?

The latest version of the Settlers of Catan board game is "Catan - 5th Edition" which was released in 2015.

This version is known for several improvements, including:

* New, more durable components

* Simplified rulebook

* Updated artwork

* Updated game board with a larger and more detailed map

* "Catan Assistant" app for online play

While some versions with different artwork and theme variations have been released since then, the 5th Edition remains the most recent version of the standard Catan board game.