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Genealogy- Old: Immigration & Naturalizations

Finding Published Records in Library Catalogs

  • naturaliz* court* delaware
  • naturalization records
  • naturalization records Pennsylvania Philadelphia

Search for the name of the place which had a court with the authority to process naturalization applications, not the place where the person lived.

The asterisk * in the example is a truncation symbol. Using it at the end of a word allows you to retrieve variations of the word without having to type them all in. For example, naturalization* will find the words: naturalization and naturalizations. naturaliz* will find: naturalization; naturalizations, and naturalize.


Family History Library Catalog (FamilySearch) has a search by place feature.

Naturalization Records

Naturalization Petition (Second Paper). John Casey of Ireland.  Delaware Public Archives, Digital Archives, Documents, in New Castle County Naturalizations. New York, Petitions for Naturalization, 1794-1906 [database on-line]. National Archives at New York City; County Court of Kings County.

Prior to 1906, any "court of record" (municipal, county, state, or federal) could grant citizenship. In 1906, the federal government assumed responsibility for naturalization and citizenship.

For more information about naturalization, see

in The Source: A Guidebook to American Genealogy

Where to Find Records

Genealogy Resources at the University of Delaware Library

Family tree

Although not aimed at genealogy and family history, the collections of the University of Delaware Library (Morris Library) include materials useful to genealogists and family historians.

This Genealogy Research Guide is provided as a service for genealogists. It presents topics and resources to assist researchers.

The UD Library does not specialize in genealogy and does not have staff responsible for genealogy. Library staff cannot conduct research.

For questions about library resources and holdings, use the Ask the Library service.

For questions about getting research assistance, see the suggestions on the home page of this guide or on the topic/resources pages.