A series of comprehensive hydride databases have been constructed and made freely available on the Internet (URL http://hydpark.ca.sandia.gov). They include extensive listings of alloys reported to hydride, detailed engineering properties on selected hydrogen-storage elements and alloys and a hydride-applications database. These databases and an associated reference database are described, along with Other hydride information available on the web site. The databases were created under the auspices of the International Energy Agency (IEA) with financial support from the U.S. Department of Energy (DOE) and Internet service support from the Sandia National Laboratories (SNL).