Dragondex is a small encyclopedia that is included at the end of some of the Pern books published by Corgi (dragonquest etc.). Dragondex contains information on The Founding Order of the Weyrs, the Major Holds bound to each Weyr, a list of the Lords Holder, a list of the Craftsmen, a list of Pernese Oaths, the People of Pern, the owners of fire lizards and the names of the fire lizards themselves and some terms of interest to do with Pern.

Dragondex is was written by Wendy Glasser.