[Editor's Note: Today's post was written by Richard Hanson.]
FamilySearch.org and Ancestry.com are not the only online sources for census records. Both domestic and international census databases are posted elsewhere in whole or in part. But finding them can be a bit of a challenge. Ditto for finding free versions of them.
Census Finder provides a listing of over 40,000 census links. If you can't find what you want through the posted census websites, each page also provides related links and identifies the traditional sources for vital records.