Find web sites where you can download digital elevation model datasets for your area of interest.
SRTM 90m Digital Elevation Data from the Consortium for Spatial Information
Listing of available DEM datasets compiled by Bruce Gittings.
Polar Ice Sheet DEM
Polar Ice Sheet elevation datasets available from the National Snow and Ice Data Center.
USGS DEM Data
Various scaled digital elevation model data from the USGS available for downloading covering the United States.
Worldwide Digital Data
DEMs available for online purchase from vendor.