The American Presidency Project is a major web resource providing a searchable database of, and analyses based on, presidential public documents. This includes speeches, orders, proclamations, messages, and other documents related to James Buchanan and his administrations.

This site on American presidents is designed to complement C-SPAN's 20th anniversary television series.

This publication contains a short biography of every member of Congress from 1774 to the present, including James Buchanan who served in the U.S. House of Representatives from 1821–31 and the U.S. Senate from 1834-45. It also provides a selected bibliography and a listing of research collections related to Buchanan.

The majority of this collection at Dickinson College is comprised of correspondence between Buchanan and his business and political associates; over four hundred letters penned by Buchanan are included in the collection. Drafts of speeches, printed pamphlets, and various memorabilia are also represented. Digital copies of many of these letters are available online

The James Buchanan Online Presidential Library is a digital repository of more than 3,500 items associated with James Buchanan, Harriet Lane, and James Buchanan Henry, extended family members, associates, and Wheatland, Buchanan’s home. This site produced by LancasterHistory contains letters, personal and political papers, campaign and inauguration material, legal and financial documents, ephemera, transcriptions, and photographs.

This site produced by Dickinson College contains biographical information, an extensive bibliography, images, political cartoons, and a detailed timeline of Buchanan's life. Also presented is a selection of full-text writings by and about Buchanan, including unpublished letters, published biographies, and the edited and collected writings of Buchanan.

This digital exhibition on James Buchanan was created by LancasterHistory.

The Miller Center of Public Affairs at the University of Virginia presents essays about Buchanan and his life before, during, and after his presidential terms.

President James Buchanan's Wheatland is owned and operated by LancasterHistory, formerly Lancaster County’s Historical Society. Buchanan, the fifteenth president of the United States, purchased this house in 1848. Buchanan retired to Wheatland after his presidency.

The official White House website presents a brief biography of James Buchanan.