The County Clerk maintains naturalization records for the years 1907 through 1924. These records include the following: certificate of arrival, declaration of intention and petitions. A copy of these records is available for a fee of $20, payable to the Kings County Clerk in cash, certified check or bank or postal money orders.
A search of these records may be done by mail or in person.

If you do a search in person, the cost is $10 for the certification fee and .25 cents per page.

To conduct a search by mail, the fee for a two-year search and a certificate recording the results of the search, called either a "Find on File" or a "Fail to Find" certificate, is $10.  If more years are needed to be searched an additional $5 fee is required for every additional two years or portion thereof.  Please send separate bank or postal money orders for each two-year search period. We will return any bank or postal money orders that are not used. There is a charge of $.65 cents per page with a minimum charge of $1.30 for copies of the documents. This does not include the $10 certification fee.

Mail your request, including the fee, person's name and the years to be searched, with a stamped self-addressed envelope to:

The Kings County Clerk 
Room 189, Record Room
360 Adams Street
Brooklyn, NY 11201