If filing in New York City, you do not need the order included in the below packets because the court prints its own. You also do not need the Request for Judicial Intervention form if filing in NYC.
Name change petition for New York state residents over the age of 18.
There is a different packet for minors; only use this if the person changing their name is 18 or older.
Name change packet for New York state residents under the age of 18.
There is a different packet for adults; only use this if the person changing their name is under 18.
If you live in one of the 5 boroughs, you can file in any of the 5 boroughs. Manhattan is generally the quickest and smoothest because they do a lot of trans name changes.
If you live outside NYC, you must file in the county where you live. You can google "[county] ny clerk" to find the address where you will file.