United States – General
- Background Notes – Country and regional reports from the U.S. Department of State.
- Chronicling America – this library of Congress site has digital images for thousands of archived newspapers from across the county.
- Family Locket: Examining City Directories to Discover New Avenues of Research
- Sassy Jane, Finding more in U.S. City Directories
- Google Books
- Archive.org
- HathiTrust
- U.S. State Archives/Libraries
- Digital Public Library of America
- Cyndi’s List
- Don’s List
- Atlas of Historical County Boundaries– shows how and when county boundaries changed over time.
- Geographic Names Information System – (GNIS) Search for or download U.S. place names
- RootsWeb County Finder
- United States Digital Map Library
- US County Formation Maps 1643-Present
- USGenWeb
- Library of Congress American Memory Map Collections
- Digital Sanborn Maps. Sanborn fire insurance maps feature historic detailed maps showing streets and building footprints insurance maps showing the structure and use of buildings in U.S. cities and towns. The maps are pretty available; search for Sanborn Maps and the location you want.
- Sanborn Maps – Training (YouTube)
- How to Visit Your Ancestral Hometown at Your Desk
- FamilySearch Wiki: United States Taxation
- Family History Daily: Tax Records Could Offer Surprisingly Rich Details About Your Ancestors
- Wikipedia: History of taxation in the United States
- GenealogyBank: Genealogy 101: Tax Records
- Family Locket: Back to the Basics with Tax Records: Part 1
- Family Locket: Back to the Basics with Tax Records: Part 2
- Archives: The Good News About Taxes: Finding And Using Tax Records In Your Genealogical Research
- Ancestral Findings: Tax Records: More Information Than You Think
- Genealogy Gems: Genealogy Tips: Find Ancestors in Tax Records
- National Archives: Resources for Genealogists: Tax Records
- Want to see the tax forms your ancestors filled out? The Tax History Project has U.S. 1040 tax forms from 1913 to 2006.
- American Migration Patterns
- Early American Trails and Roads
- FamilySearch – US Migration Trails and Roads
- FamilySearch Wiki – United States Migration Timeline 1784 to 1839 (National Institute)
- FamilySearch Wiki – US Migration Trails and Roads
- Historic American Roads, and Migration Routes.
- Wikipedia: Historic trails and roads in the United States – Wikipedia, the free encyclopedia
- In Motion: The African American Migration Experience
- Is It Always Possible to Find that Reason (why they moved)?
- Migrations.org
- National Oregon/California Trail Center
- Paper Trail – Pioneer Wagon Train Diaries$
- Trails West
- Western Emigrant Trails Research Center