U.S. History - General
AmDocs: documents for the study of American History
American History from Revolution to Reconstruction and Beyond
ArchiveGrid: Search for primary source materials held in archives, libraries, museums and historical societies
Authentic History Center: Primary sources from American Popular Culture
Chronicling America: Historic American Newspapers (BETA)
Click!: The Ongoing Feminist Revolution
Fold3, by Ancestry: Discover Your Family's Military Past
Historical Documents, Office of the Historian, U.S. Department of State
Immigration History Research Center: Founded in 1965, the IHRC and IHRCA (IHRC/A) promote interdisciplinary research on migration, race, and ethnicity in the U.S. and the world, develop archives on immigrant and refugee experiences, especially in the United States, and support public programming and community engagement.
National Archives and Records Administration and National Archives Digital Vaults
New York Heritage digital collections
New York State Digital Collections
Smithsonian Institution: Collections Search Center (search by subject)
Women's History links (National Women's History Project)
17th and 18th Centuries
Plimoth Plantation and Plymouth Public Library: Local History and Genealogy Resources
U.S.History.org: "Congress" of Revolutionary War-era web sites
Williamsburg, VA: educational resources
19th Century
Immigration History and Genealogy (U.S. Citizenship and Immigration Service)
Making of America: primary sources from Antebellum to Reconstruction periods
20th Century
Holocaust Links
U.S. Holocaust Museum: A Learning Site for Students and Resources for Educators
World War I: trenches on the WebWorld War I Document Archive
World History (many will also contain information on U.S. topics)
Ancient & Medieval World
Labyrinth: A WWW server for Medieval Studies
Perseus Project: Tufts University ancient history site
General
Avalon Project at Yale Law School: Documents in Law, History and Diplomacy
Awesome Stories: thousands of hand-selected and relevant links to pictures, slide-shows, videos, audio-clips, artifacts, manuscripts, documents and other primary sources linked, in context, within each story.
Clothing & Textile Collections in the U.S & International (Costume Society of America)
"Costume Gallery Research Library"
Eurodocs: primary historical documents from Western Europe
History and MultiCultural Resources from (Facts on File): requires HWPL Library card
History Departments Around the World
HistoryNet: where history lives on the web
Internet History Sourcebooks: primary sources/historical texts
Mapping History: world history through maps, tables and photographs
National History Day: research links to primary sources: U.S. and World
Paper of Record: digital archive of historical newspapers
Jewish History