Hello.
If your father naturalized after being a lawful permanent resident then you are not eligible for automatic citizenship unless you had lawful permanent residence living in the US and under the age of 18.
If he automatically received citizenship from one of his parents then there may be a way to transmit his citizenship to you.
Either way he can still file a petition for you to get lawful permanent residence, it just may take a while if you are over 21 years of age.
For more case specific information please contact me for a free consultation.
Answered on Feb 10th, 2016 at 1:40 PM