American Documents

Arranged chronologically 800–2008
http://www.vlib.us/amdocs/

Avalon Collection, Yale University

Avalon Home
Documents in Law, History, Economics, Politics, Diplomacy and Government
http://avalon.law.yale.edu/default.asp

Avalon Collections
Arranged by broad topic
http://avalon.law.yale.edu/subject_menus/major.asp

Best History Sites

Contains annotated links to over 1,200 history Web sites
http://www.besthistorysites.net/

George Mason History Matters

Document collections under "Many Pasts" and links to more Web sites by topic and time period under "WWW History"
http://historymatters.gmu.edu/

Library of Congress

American Memory Special Collections from Library of Congress    
http://memory.loc.gov/ammem/index.html

Primary Sources in American History by Theme
http://www.loc.gov/teachers/classroommaterials/primarysourcesets/

Primary Sources in American History Period    
http://www.loc.gov/teachers/additionalresources/relatedresources/ushist/chrono/

Ninteenth Century in Print: the Making of American in Books and Periodicals   

From the Library of Congress, books and 23 periodicals published in the United States during the (mostly) late nineteenth century. Subject areas include education, psychology, American history, sociology, religion, and science and technology.
http://memory.loc.gov/ammem/ndlpcoop/moahtml/ncphome.html

Statistics from Census Bureau 1789–2010 by topics

http://www.census.gov/compendia/statab/hist_stats.html

Speeches

Database of and index to 5000+ full text, audio and video versions of public speeches, sermons, legal proceedings, lectures, debates, interviews, other recorded media events.
http://www.americanrhetoric.com/

U.S. National Archives   

Primary documents arranged by time period.
http://docsteach.org/documents