Databases:

Accessible Archives (access restrictions apply)
     The Pennsylvania Gazette (1728-1800)
     The Liberator (1831-1865)
     African American Newspapers: The 19th Century
        Freedom's Journal (March 16, 1827 - March 28, 1829)
        The Colored American (January 7, 1837 - December 25, 1841)
        The North Star (December 3, 1847 - April 17, 1851)
        The National Era (January 7, 1847 - March 22, 1860)
        Provincial Freeman (1854 - 1857)
        Frederick Douglass Paper (1851 - 1855)
        The Christian Recorder (1861 - 1891, 1893)
     The Civil War: A Newspaper Perspective: November 1860 - April 1865
        The Charleston Mercury
        The New York Herald
        Richmond Enquirer
     The Pennsylvania Newspaper Record: Delaware County 1819-1870

Ethnic Newswatch (access restrictions apply)
     List of newspapers indexed

Historical Newspapers Online  (access restrictions apply)
     Palmer's Index to the Times (1790 to 1905 in The Times)
     Palmer's Full Text Online, 1785-1870, (from those referenced in Palmer's Index)
     The Official Index to the Times (1906 to 1980 in The Times)
     The Historical Index to the New York Times (1851 to September 1922)

ABI/Inform  (access restrictions apply)

New York Times 1857 - 2003  (access restrictions apply)
      Most articles are available free back to 1987
      and prior to 1923 on the NYTimes Archiver site

LexisNexis Academic  (access restrictions apply)

NewsBank NewsFile Collection (access restrictions apply)

Newspaper Source  (access restrictions apply)

 

Print Indexes: (located on 1st floor of RBD)

Atlanta Constitution
     1971 - 1979
Boston Globe
     1983 - 1993
Chicago Tribune
     1972 - 1978
Houston Post
     1987-1994
Los Angeles Times
     1976 - 1978
New Orleans Times-Picayune
     1987 - 1995
New York Times
     1851 - 1862; 1905 - 1912;1913 - 1993
The Times (London)
     1790 -