These sites are recommended for historical research, and are selected for authority, accuracy, objectivity, coverage, and currency. They do not include the article databases available through Olin Library subscription.
From the University of Virginia, Geospatial and Statistical Data Center. Using data drawn directly from historical volumes of the U.S. Census of Population and Housing, this site allows you to search and map characteristics from US Census data from 1790 to 1960.
USCIS is the government agency that oversees lawful immigration to the United States. This site features information on the USCIS, US immigration laws and regulations, and forms for those seeking to immigrate, get a green card, or apply for citizenship. I
In addition to historical information about Ellis Island, this site allows users who register for a free account to search a database of immigrant arrival records. Much if not all of this information is also available to Rollins students in the Ancestry Library Edition.
A web-based collection of historical materials from Harvard's libraries, archives, and museums that documents voluntary immigration to the United States from the signing of the Constitution to the onset of the Great Depression. The related links page on this site is a particularly useful set of recommendations for further immigration research sites.
Creative Commons offers convenient access to search services for finding images licensed for re-use. Be sure to check the license conditions on each individual image you wish to use.