History Research Guide

Understand the changing nature of the decennial census from 1790-2010 and access summary data, questionnaires, instructions, and more for each decade.

Corresponding with data gathered through the decennial census during these years, these atlases also contain summary essays, graphs, and tables as well as maps.

Published since 1878, this is the authoritative and comprehensive summary of statistics on the social, political, and economic organization of the United States. Sources of data include the Census Bureau, Bureau of Labor Statistics, Bureau of Economic Analysis, and many other federal agencies and private organizations.

MeasuringWorth is a service for calculating relative worth over time. The site has two missions. First, to make available the highest quality and most reliable historical data on important economic aggregates, with particular emphasis on nominal (current-price) measures, as well as real (constant-price) measures. Second, to provide carefully designed comparators (using these data) that explain the many issues involved in making value comparisons over time.

Online access to over 6000 sheets in the following states: AK, AL, AZ, CA, CT, DC, GA, IL, IN, KY, LA, MA, MD, ME, MI, MO, MS, NC, NE, NH, NJ, NV, OH, PA, TX, VA, VT, WY and Canada, Mexico, Cuba sugar warehouses, and U.S. whiskey warehouses.

A feature of National Geographic

The American Geographical Society Library Digital Map Collection currently contains over 700 maps, ranging from early maps of Asia to historical maps of Wisconsin and Milwaukee, and other American cities, states, and national parks. The digital collection is under continuing development.

Provides access to digital representations of maps found in the Geography and Maps Division of the Library of Congress and covering the years 1500-1999. Search using keywords or browse the subject, title, creator and geographic indexes to find maps that are focused on Americana and cartographic treasures found in the Library of Congress.

A project of the William M. Scholl Center for American History and Culture at The Newberry Library in Chicago, the Atlas presents in maps and text complete data about the creation and all subsequent changes (dated to the day) in the size, shape, and location of every county in the fifty United States and the District of Columbia.

Includes land patents, survey plats and field notes, and land status records.

**** For GLO Record legend information, see http://www.mngeo.state.mn.us/glo/Legend_Main.htm

A historical map collection with over 21,000 maps and images online. The collection focuses on rare 18th and 19th century North American and South American maps and other cartographic materials. Historic maps of the World, Europe, Asia, and Africa are also represented.

Highway maps from 1935 on.

See http://project.oldmapsonline.org/about for information about this site.