Archives of newspapers, freely available to all.
The Internet Archive Newspaper Archive has more than a hundred collections and hundreds of thousands of individual items.
☛The Library of Congress has an interactive map of all digitized newspapers in its Chronicling America collection.
Alaska Sentinel, 1902–1909.
The Los Angeles Times. A huge archive beginning in the 1880s and going at least to the 1960s.
The Atlanta Constitution, 1868–1961. An enormous archive.
Chicago Daily Tribune, 1849–1945. An enormous archive.
The Kentucky Tribune, 1851–1857.
Bangor Daily Whig and Courier, 1832–1900.
The Cumberland News, 1938–1962.
Cumberland Evening Times, 1957–1959.
Easton Gazette, 1821–1836.
The Boston Morning Post, 1834–1837.
The Boston Weekly Globe, 1882–1892.
St. Louis Post-Dispatch, 1879–1961.
The New-York Mercury, 1753–1756; 1829.
☛Pittsburgh newspapers have their own page.
Gazette and Bulletin, 1924–1955.
Virginia Gazette, or Norfolk Intelligencer, 1774–1775.
The Virginia Gazette, and General Advertiser, 1791–1809, with a gap (see below).
The Virginia Gazette, and General Advertiser, 1803–1805.
The Age, 1854–1989.
The Sydney Morning Herald, 1842–1918.
The Halifax Gazette/The Nova Scotia Gazette, 1752–1780. —Covers the American Revolution from the other side.
The North-China Herald, 1850–1941.