Underdark (disambiguation)

Underdark might refer to:
* The Underdark, a subterranean realm renowned for being the home of the drow and other evil beings
* The equivalent of the Underdark in the world of Abeir.
* Underdark (sourcebook), the 2003 3rd edition sourcebook about the Underdark
* Underdark (4th edition sourcebook), the 2010 4th edition sourcebook about the Underdark
* The Underdark, a tavern in the Trades Ward of Waterdeep