Illinois, County Naturalization Records - FamilySearch Historical Records

What is in the Collection?
The collection consists of images of naturalization records from county courthouses in Illinois for the years 1800 to 1862. The content and time period varies by county. Few counties have records after 1945.

Collection Content
Naturalization is the process of granting citizenship privileges and responsibilities to foreign-born residents. The first naturalization act was passed in 1802. Immigrants to the United States were not required to apply for citizenship. Of those who did apply, many did not complete the requirements for citizenship.

Naturalization to become a U.S. citizen was a two-part process: the Declaration of Intent to Naturalize, or First Papers, and the Naturalization Record (including the Naturalization Petition), or Final Papers. The First Papers were normally filed five years before the Final Papers because of the five-year residency requirement to become a citizen.

No centralized files existed before 1906. In 1906 federal forms replaced the various formats that had been used by the various courts. Copies were sent to the Immigration and Naturalization Service (INS), creating a central file for naturalization papers. The INS is now known as the U.S. Citizenship and Immigration Services (USCIS).

Naturalization records are generally well preserved, but some records may have been lost to fire or other disasters.

The information that was current at the time of naturalization was usually reliable. However, there was always a chance for misinformation. Errors may have occurred because of the informant’s lack of knowledge or because of transcription errors or other circumstances.

What Can this Collection Tell Me?
Naturalization Records usually include the following information:


 * Name of court
 * Full name of Petitioner
 * Place of residence
 * Occupation
 * Date and place of birth
 * Date of emigration, date of arrival
 * Port of entry and name of ship
 * Date and place of Declaration of Intent to become citizen
 * Name of spouse
 * Date of marriage
 * Number of children, name and residence of each child
 * Birth date and place of birth of each child
 * Able to speak English?
 * Affidavit of witness(es)

How Do I Search the Collection?
To begin your search it is helpful to know:


 * The full name of your ancestor.
 * The approximate date of immigration.
 * The approximate date of naturalization.
 * The ancestor’s residence at the time of naturalization.

If you do not know this information, check the 1900 census and then calculate the possible year of naturalization based on the date of immigration. The 1920 census may tell you the exact year of immigration or naturalization. If your ancestor naturalized befor 1900, check the census records to see when he or she first appeared in the census. This will give you a 10 year window in which they may have immigrated.

View images in this collection by visiting the Browse Page: To search the collection you will need to follow this series of links: ⇒Select "Browse" link in the initial search page ⇒Select "County" ⇒Select "Record Type, Year Range, Volume number/letter" which takes you to the images.

Look at each image comparing the information with what you already know about your ancestors to determine if the image relates to them. You may need to look at several images and compare the information about the individuals listed in those images to your ancestors to make this determination.

Keep in mind:
 * There may be more than one person in the records with the same name.
 * You may not be sure of your own ancestor’s name.
 * Your ancestor may have used different names or variations of their name throughout their life.

What Do I Do Next?
When you have located your ancestor’s naturalization record, carefully evaluate each piece of information given. These pieces of information may give you new biographical details that can lead you to other records about your ancestors. Add this new information to your records of each family. For example, you can use naturalization records to:


 * Learn an immigrant’s place of origin
 * Confirm their date of arrival
 * Learn foreign and “Americanized” names
 * Find records in his or her country of origin such as emigrations, port records, or ship’s manifests.

I Found Who I was Looking for, What Now?

 * Look for the Declaration of Intent soon after the immigrant arrived, then look for the Naturalization Petition five years later when the residency requirement would have been met. Look for naturalization records in federal courts and then in state, county, or city courts.
 * An individual may have filed the first and final papers in different courts and sometimes in a different state if the person moved. Immigrants who were younger than 18 when they arrived did not need to file a Declaration of Intent as part of the process.
 * If your ancestor had a common name, be sure to look at all the entries for a name before you decide which is correct.
 * Continue to search the naturalization records to identify siblings, parents, and other relatives in the same or other generations who may have naturalized in the same area or nearby.
 * The witnesses named on naturalization records may have been older relatives of the person in the naturalization process. Search for their naturalizations.
 * You may want to obtain the naturalization records of every person who shares your ancestor’s surname if they lived in the same county or nearby. You may not know how or if they are related, but the information could lead you to more information about your own ancestors.

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

 * Check for variant spellings. Realize that the indexes may contain inaccuracies, such as altered spellings and misinterpretations.
 * Look for an index. Local genealogical and historical societies often have indexes to local records.
 * Search the naturalization records year by year.
 * Search the indexes of nearby counties.

Known Issues with This Collection
For a full list of all known issues associated with this collection see the attached article. If you encounter additional problems, please email them to [mailto:support@familysearch.org support@familysearch.org]. Please include the full path to the link and a description of the problem in your e-mail. Your assistance will help ensure that future reworks will be considered.

Citing this Collection
Citations help you keep track of places you have searched and sources you have found. Identifying your sources helps others find the records you used.


 * Collection Citation:

Top of Page