These news outlets are all based in the U.S., though many of them cover international news as well as national news.
The following are some of the major, and most widely read, newspapers in the United States. Check WorldCat Local and the Periodicals section of the library for some of these titles.
Library of Congress Newspaper and Current Periodicals Reading Room - The LOC has a wide range of finding aids, links, and other resources devoted to news sources. This particular page provides links to actual newpapers and to sites that can help you locate and assess news sources.
Internet Public Library Newspaper Collection - You can search by state and also browse for newspapers world wide