The purpose of this resource guide is to provide health sciences, medical, and large libraries a description of the content and features of the most popular Web sites on euthanasia. The redundancy in results of searches of the term "euthanasia" in multiple search engines indicates the high likelihood that information seekers will be directed to one or more of these sites. The eight most frequently retrieved sites are discussed here with attention paid to position (i.e., pro- or anti-euthanasia), authority, degree and quality of linkage, and uniqueness of information provided. These descriptions should help librarians direct their users to appropriate sources of information about euthanasia on the Web.