To register in New Jersey you must be:
The registrant must complete a Voter Registration Application and/or Party Affiliation Form. Mail or deliver the Voter Registration Application and/or Party Affiliation Form to the County Commissioner of Registration or Superintendent of Elections for your county.
You are not eligible to register to vote if:
Note: If you are no longer serving a sentence, or no longer on parole or probation...,
you CAN vote in NJ by completing a new voter registration form (linked above).
You only lose your right to vote while on parole, probation or serving a sentence due to a conviction for an indictable offense under any federal or state laws.