Maryland Naturalization Indexes (FamilySearch Historical Records)

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Maryland Naturalization Indexes, 1797-1951 .
This article describes a collection of records at
Maryland, United States
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Record Description
Record Type Naturalization Indexes
Record Group RG 21: Records of District Courts of the United States
Collection years 1797-1951
Microfilm Publication M1168. Indexes to Naturalization Petitions to the U.S. Circuit and District Courts for Maryland, 1797-1951. 25 rolls.
FamilySearch Resources
Related Websites
National Archives and Records Administration

What is in the Collection?

The collection consists of six separate alphabetic indexes to naturalization petitions filed in the U.S. Circuit and District courts of Maryland from 1797 to 1951. Each index comprises a specific time period.

  • Rolls 1 -18, 1797-1906
  • Roll 18, Oct 1906-Apr 1915, Apr 1915-Apr 1920, Apr 1920-Oct 1925
  • Rolls 18-24, Nov 1925-Dec 1951
  • Rolls 24-25, An index to aliens who joined the U.S. military between May 1918 and Apr 1923.

The collection corresponds to NARA M1168. Index courtesy of Fold3 (previously

Collection Content

The cards include the following:

  • Petition number
  • Date of petition
  • Volume and page number of the petition

Some of the cards also show:

  • Declaration number
  • Date of declaration
  • Volume and page number of the declaration
  • Certification number
  • Date of issuance

Declaration of Intent and Naturalization Petitions usually included the following:

  • Name of the immigrant
  • Country of birth
  • Arrival date
  • Date of Declaration of Intent or Naturalization
  • Names of witnesses
  • Signature of judge or court official

In post-1906 records, you may also find:

  • Birth date
  • Birthplace
  • Age
  • Race
  • Last foreign residence
  • Current residence
  • Arrival place
  • Marital status
  • Name of spouse
  • Maiden name of wife
  • Birth date of spouse
  • Residence of spouse

How Do I Search the Collection?

When searching the index it is helpful to know the following:

  • The full name of your ancestor
  • The approximate immigration and naturalization dates
  • The ancestor’s residence

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.

Search by Name by visiting the Collection Page:
Fill in the requested information on the initial search page. This search will return a list of possible matches. Compare the information about the individuals in the list to what you already know about your ancestors to determine if this is the correct family or person. You may need to compare the information about more than one person to find your ancestor. 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.
  • If your ancestor used an alias or a nickname, be sure to check for those alternate names.
  • Even though these indexes are very accurate they may still contain inaccuracies, such as altered spellings, misinterpretations, and optical character recognition errors if the information was scanned.

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

I Found Who I was Looking for, What Now?

When you have located your ancestor’s 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.

Tips to Keep in Mind

  • Look for the Declaration of Intent soon after the immigrant arrived, and 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.
  • Search the indexes of nearby counties.
  • Try alternative search methods such as only filling in the surname search box (or the given name search box) on the landing page leaving the other box empty and then click on search. This should return a list of everyone with that particular name. You could then browse the list for individuals that may be your ancestor.

Additional Information About Naturalization Records

The actual naturalization volumes vary in size and format. Prior to 1906 each document was usually handwritten on one page. From the late 1800s and on, printed forms were used. After 1906, many entries were typewritten.

While there were various types of naturalization records, the Declaration of Intent and Naturalization Petition usually had the most complete genealogical information.

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.

Naturalization is the process of granting citizenship privileges and responsibilities to foreign-born residents. New York’s counties recorded naturalization procedures in the court records as legal proof of citizenship. The courts handling naturalizations changed several times so the card index was created as a way to quickly access specific records.

The index is very accurate and 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.

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

"Maryland, Naturalization Indexes, 1797-1951" Database. FamilySearch. : accessed 2016.From "Indexes to Naturalization Petitions to the U.S. Circuit and District Courts for Maryland, 1797-1951." Database. : n.d. Citing NARA microfilm publication M1168. Washington, D.C.: National Archives and Records Administration, 1982.

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 Maryland Naturalization Indexes, 1797-1951.

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