Abstract—This article presents the results of a webometric study of 461 library websites of the global web space (98 countries). The main attention in the work is paid to indicators of presence in the world wide web, such as the number of web pages, full-text files, and backlink indicators. The result of the study was the ranking of library sites for 3 years (2018–2020), the first place in which is consistently occupied by the site of the Library of Congress (Washington, United States). The leading position in the Russian segment were held by the site of the Russian National Library in the first 2 years, which was displaced later by the Vologda Regional Universal Scientific Library.