U. S. Immigration

Caribbean Sea Migration Collection: Materials related to Cuban, Dominican and Haitian maritime migration from 1965-1996, including camps at the U.S. Naval Station, Guantánamo Bay, Cuba, 1991-1996.

North American Immigrant Letters, Diaries and Oral Histories

Annual report of the Superintendent of Immigration to the Secretary of the Treasury, 1891-1924.
Online Version

Annual Report of the Commissioner of Naturalization to the Secretary of Labor, 1912-1932
Online Version

Annual Report of the Immigration and Naturalization Service, 1941-1986
Online Version

U.S. Citizenship and Immigration Services Electronic Reading Room offers documents released via Freedom of Information Act (FOIA) Requests.

Immigration Law & Policy in the U.S. includes historical documents and legislation together with current hearings, debates and developments in immigration law. Also includes scholarly articles and an extensive bibliography.

Immigration to the United States, 1789-1930 offers material from Harvard libraries, archives, and museums.

U.S. immigration and naturalization laws and issues: a documentary history, ed. by Michael LeMay and Elliott Robert Barkan. Westport, Conn.: Greenwood Press, 1999, 336 p.
HOLLIS record with online table of contents

House-Senate U.S. Immigration Commission (or Dillingham Commission) reports (1907-1911) 41 vols.  Allied to anti-immigration members of Congress.

Immigration : records of the INS, 1880-1930

The Immigrant in America. 7 units on 264 microfilm reels + guides (7 v.)
HOLLIS Record 
Online Guide 

Immigration and Refugee Services of America records, 1918-1985 : from The Immigration History Research Center, University of Minnesota. 4 pts. on 354 microfilm reels + guides (5 v.)
HOLLIS Record 
Online guide