California, San Francisco, World War I Enemy Alien Registration Affidavits (FamilySearch Historical Records)

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California, San Francisco, World War I Enemy Alien Registration Affidavits, 1918 .
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This article describes a collection of records at FamilySearch.org.
San Francisco, California, United States
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Flag of California
US locator map California San Francisco.png
Location of San Francisco County, California
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Location of California
Record Description
Record Type World War I
Collection years 1918
FamilySearch Resources
Related Websites


What is in the Collection?

This collection contains a digital browse. Clicking on the "Browse through images" link on the collection page will take you to a list of digital film numbers. The list does not contain any description of the content of the film. To see a description of the content see California, San Francisco, registration affidavits of enemy alien, 1918 in the FamilySearch Catalog.

Subjects of the German Empire age 14 and older " living within the United States were required to register with the Justice Department during World War I. This collection consists of registration affidavits for California and was acquired from the the San Francisco Public Library. This collection is being published as images become available.

Collection Content

Sample Images

Information in the Registration Affidavits generally include the following:

What Can this Collection Tell Me?

  • Full Name of applicant
  • Date Registration was Filed
  • Address when registered
  • Age
  • Physical description
  • Photo
  • Married or not
  • Been in Military
  • Number of Children (If married)
  • Children's Gender
  • Finger prints

How Do I Search the Collection?

To begin your search it is helpful to know at least some of the following:

  • The name of your ancestor.
  • The date registration was filed.
  • The place of residence when they registered.
  • The name of the spouse.

Fill in the requested information in the initial search page. This search will return a list of possible matches. Compare the information in the list to what you already know about your ancestor to determine if it is the correct family or person. You may need to compare several persons in the list before you find your ancestor.

Search by Name by visiting the Collection Page.

View images in this collection by visiting the Browse Page then select the Digital Folder Number.


For tips about searching on-line collections see the wiki article FamilySearch Search Tips and Tricks.

What Do I Do Next?

Whenever possible, view the original records to verify the information and to find additional information that might not be reported. These pieces of information can lead you to additional records and family members.

I Found Who I was Looking for, What Now?

  • Use the age in the record to find an approximate birth year, find other records such as birth, census, and death records.
  • Use the information in each record to find additional family members.
  • Repeat this process with additional family member’s records to find more generations of the family.
  • Church Records often were kept years before government records were required and are a good source for finding ancestors before 1900.


I Can’t Find Who I’m Looking for, What Now?

  • Try viewing the original record to see if there were errors in the transcription of the name, age, residence, etc. Remember that there may be more than one person in the records with the same name.
  • Collect entries for every person who has the same surname. This list can help you identify possible relations that can be verified by records.
  • If you cannot locate your ancestor in the locality in which you believe they lived, then try searching records of a nearby locality in an area search.
  • Standard spelling of names typically did not exist during the periods our ancestors lived in. Try variations of your ancestor’s name while searching the index or browsing through images.
  • Remember that sometimes individuals went by nicknames or alternated between using first and middle names. Try searching for these names as well.
  • Search the indexes and records of California, United States Genealogy.
  • Search in the California Archives and Libraries.

Citing this Collection

Citing your sources makes it easy for others to find and evaluate the records you used. When you copy information from a record, list where you found that information. Here you can find citations already created for the entire collection and for each individual record or image.

Collection Citation:

"California, San Francisco, World War I Enemy Alien Registration Affidavits, 1918." Database with Images. FamilySearch. http://FamilySearch.org : accessed 2017. Citing County Clerk. San Francisco Public Library, History and Archives.

Record Citation (or citation for the index entry):

The citation for a record is available with each record in this collection, at the bottom of the record screen. You can search records in this collection by visiting the search page for California, San Francisco, World War I Enemy Alien Registration Affidavits, 1918.


Image Citation:

The image citation is available by clicking on the Information tab at the bottom left of the screen. You can browse through images in this collection by visiting the browse page for California, San Francisco, World War I Enemy Alien Registration Affidavits, 1918.


How Can I Contribute to the FamilySearch Wiki?

We welcome user additions to FamilySearch Historical Records wiki articles. We are looking for additional information that will help readers understand the topic and better use the available records. We also need translations for collection titles and images in articles about records written in languages other than English. For specific needs, please visit WikiProject FamilySearch Records.

Please follow these guidelines as you make changes. Thank you for any contributions you may provide.