Maps

• Evolution of United States County Boundaries
• Formation of the Contiguous United States
• View the National Highway System Maps Online
• Evolution of Washington State's Counties
• The Percy Map
• New York State Historical Maps
• John Mitchell's Map
• Cultural Maps
• Historical Maps of the United States
• Pioneer Trails
• Wisconsin Local History Network

   

  Historical geography

• Historical Atlas of Canada Data Dissemination Project
• The Ryhiner Project
• Long Island Maps and Their Makers
• Old Maps of New England and New York
• TSLAC Map Archive
• Exploring the West from Monticello: A Perspective in Maps from Columbus to Lewis and Clark
• Historical United States County Boundary Files

  Time Periods

• Territorial Expansion of the United States : 1783-1853
• United States after the Treaty of Paris : 1783
• Native American Tribes : 1783
• European Possessions Bordering the U.S. : 1783
• Louisiana Purchase : 1800-1803
• Journeys of Lewis & Clark : 1804-1806
• Jackson's Campaigns in Florida : 1818
• Territory ceded by Spain : from 1810 to 1819
• Texas : 1836
• Oregon Country : 1843-1848
• The War with Mexico: 1823-1846
• Mexican Cession: Political Boundaries
• Gadsden Purchase & Proposed Rail Routes : 1853
• Alaska and Hawaii
• Cotton Production in the American South: 1790-1860
• Slave Crops in the American South: 1860
• Slavery in the American South: 1790-1860
• Status of Slavery in Original 13 States
• The Missouri Compromise : 1820
• Compromise of 1850 : Status of Slavery
• Kansas-Nebraska Act : 1854