Old Maps Online U.S. – Old America Maps – Old US Map Free

Census Atlas of the United States – Old Maps Online U.S.

Containing almost 800 maps. Data from decennial censuses prior to 2000 support nearly 150 maps and figures, providing context and an historical perspective.

Great Lakes Maps, Atlases & Map Collections – Old Maps Online U.S.

For the Great Lakes region, at “History of the Great Lakes States”.

Library Research Guide (LibGuide) – Internet Sites with Online Map Collections for U.S. History – Old Maps Online U.S.

This research guide from the librarians at Bowling Green State University contains links to a large number of websites with map collections for U.S. history.

Historical Atlases and Maps of U.S. and States – Old Maps Online U.S.

Contains rotating animated maps showing county boundary changes. Past and present maps of US are overlaid so that you can see the changes in county boundaries, downloadable County D.O.T. Maps, and state atlas maps.

Historical Maps Online – Old America Maps

Maps charting the last 400 years of historical development in Illinois and the Northwest Territory. 420 items. Univ. of Illinois at Urbana-Champaign.

Illinois Maps, Map Collections & Gazetteers – Old America Maps

At “History of the Great Lakes States”.

Indiana Maps, Map Collections & Gazetteers – Old Maps America

At “History of the Great Lakes States”.

Iowa Counties Historic Atlases – Old Maps Online U.S.

The University of Iowa Libraries

USGS Maps for 50 U.S. States – Old Maps Online U.S.

Sets of USGS maps for every state. 60,000 maps in all. Internet Archive.

Lewis & Clark Expedition Maps – Old Maps America

86 hand-drawn maps by members of the expedition. Beinecke Rare Book & Manuscript Library, Yale University.

Maps of American Westward Migration – Old America Maps

63 maps, mostly of Mormon migration in the mid-19th century. Mountain West Digital Library.

Maps of Railroads in the U.S. – Old America Maps

Maps of Railroads in the Western U.S. – Old US Map Free

51 items at the first link, and 32 in the second, mostly from the 19th Century. Beinecke Library, Yale University.

Michigan Maps, Map Collections & Gazetteers – Old America Maps

At “History of the Great Lakes States”.

Ohio Maps, Atlases & Map Collections – Old Maps America

At “History of the Great Lakes States”.

Panoramic Maps of Cities and Towns, 1800-1899 – Old US Map Free

Library of Congress sub-collection

Railroad Maps, 1828-1900 – Old US Map Free

623 maps. Railroad maps and regional, state, and county maps showing “internal improvements” of the past century. Library of Congress.

Road Maps of New England, ca. 1925 – Old Maps America

From the Automobile Green Book, published by an auto association.

Sanborn Maps at Library of Congress – Old US Map Free

The Sanborn maps are detailed maps of cities produced by fire insurance companies. This collection has over 25,000 sheets from over 3000 city sets in about 35 U.S. states, and Canada and Mexico. Library of Congress.

U.S. National Parks and Monuments Maps – Old US Map Free

The Perry-Castaneda collection at University of Texas at Austin Libraries.

United States Historical City Maps – Perry-Castaneda Map Collection – Old Maps Online U.S.

University of Texas at Austin Libraries

United States Historical Maps at the Perry-Castaneda Map Collection – Old Maps Online U.S.

University of Texas at Austin Libraries

Wisconsin Maps, Map Collections & Gazetteers – Old Maps America

At “History of the Great Lakes States”.