Wikipedia:Public domain resources
There are many resources on the World Wide Web that are in the public domain (see Wikipedia:Public domain), and therefore are freely usable on Wikipedia and its sister projects without legal restrictions. Note, however, that wherever public domain resources are used on Wikipedia they should be properly attributed, just like any other source (see Wikipedia:Citing sources and Wikipedia:Plagiarism​).
This page is intended as a helpful guide to public-domain resources.
Caveats and notes
 This article incorporates public domain material from the CIA World Factbook website https://www.cia.gov/the-world-factbook/​.
See Wikipedia:Template messages/Sources of articles (note that this lists templates for both public domain and non-public domain sources) and attribution templates. Attribution templates are extremely helpful to other editors; it allows them to easily locate articles that use a particular public domain source, by using the "What links here" feature on the template page.
Searchable Web version of now out-of-copyright Webster's Revised Unabridged Dictionary (1913, 1828), provided by the The ARTFL Project of the Department of Romance Languages and Literature, University of Chicago
Physics for Free has two public domain physics books by former Yale professor Frank Firk: one about basic physics, one about groups and particles
(U.S. Federal Government) Biographical Directory of the United States Congress 1774 to present ({{bioguide}})
Note: the images on bioguide may or may not be PD. Their copyright notice is at [1].
History of Canada
Ancient History
Language and Linguistics
Political science
(US Federal Govt.) Library of Congress Country Studies An online version of the Library of Congress Country Studies with information on 101 countries, including detailed histories.
Classics in the History of Psychology is a collection of classic public domain works in psychology collected by Christopher D. Green: see here for a note about the copyright status of the individual documents in the collection
National Park Service Heritage Documentation Program {{​PD-USGov-Interior-NPS​}}
Library of Congress
American Memory Home
Prints & Photographs Online Catalog (PPOC)Not all images displayed in this catalog are in the public domain
Business and industry
(US Federal Govt.) US Energy Information Agency – statistics and info on energy industry (mostly US but some stuff for the world) – they appreciate but do not require acknowledgement (copyright info here)
Computer science
ERIC Digests This site has several thousand education articles. They were all produced by the US Government ERIC Clearinghouse system. All of them are also in the public domain and can be used freely for content at Wikipedia.

U.S. federal government
Title 17 USC §105, Subject matter of copyright: United States Government works, provides that "Copyright protection is not available for any work of the United States Government," defined in Title 17 USC §101, as "a work prepared by an officer or employee of the United States Government as part of that person's official duties." Therefore, only those works solely authored by US Federal Government employees are not protected by copyright in the United States.
Works produced by contractors and grantees for the federal government are generally protected by copyright. In such cases, the Government is granted a nonexclusive, irrevocable, worldwide, royalty-free license in the work to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, and to allow others to do so, for U.S. Government purposes. The Government’s license does not place these works in the public domain. Additionally, a copyrighted work for which the copyright has been transferred to the Government by assignment or bequest is not in the public domain.
Look for copyright and permissions notices on U.S. Federal Government publications and websites. However be cautioned that government agencies often advise that in the absence of a copyright notice, users may assume their information is not copyrighted. This contradicts the copyright law as amended in 1989, when the United States joined the Berne Convention for the purpose of harmonizing domestic copyright law with international copyright standards. While use of a copyright notice and registration was once required as a condition of copyright protection in the United States, it is now optional, and a work is not necessarily in the public domain simply because it does not have a copyright notice.
For further discussion, see: Don't keep the public guessing: best practices in notice of copyright and term & conditions of use for government web site content (2004) by the CENDI Copyright & Intellectual Property Working Group.
See also: Wikipedia:WikiProject Maps
Works of the United States federal government:
Non-U.S. federal government
Philipine Government (Republic of the Philippines)[1]
Solar energy
Library of public domain images of operational Solar Power projects (-This link is broken not found)
From the World-wide Information System for Renewable Energy (WIRE), which is a service provided by the International Solar Energy Society (ISES – http://www.ises.org/ ).
Science, medicine, and technology
General resources
World Monthly Surface Station Climatology, 1738-cont almost 200 MB of weather data from over 4700 stations starting in 1738.
Geology and Earth science
Biology and zoology
Article Index 1879–1922 of the Crittenden Automotive Library
Harpers Dictionary of Classical Antiquities (1898) can be found via http://www.art.man.ac.uk/clah/links/searchency.htm
Project GutenbergProject Gutenberg provides over 34,000 free public domain texts.
Wikisource has the text of the 1913 Catholic Encyclopedia article Public domain resources.
Several 19th-century out-of-copyright Christian biblical dictionaries – Note that these will need to be checked for accuracy (make sure statements have not been superseded by more recent academic work) and to keep a neutral point of view
Three parallel texts of the Qur'an – translations of the Qur'an hosted by the Center for Muslim-Jewish Engagement at the University of Southern California
Copy on Google Books, downloadable as PDF, of 1920 edition of Lewis Spence's An Encyclopaedia of Occultism
See also
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Last edited on 28 May 2021, at 10:32
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