Registering to Vote in New Hampshire is easy! Register to vote at your town hall before the deadline or register to vote the day of the election at the polling place. No matter when or where you decide to register, you will be required to complete a Voter Registration form. New Hampshire inhabitants who will be 18 years of age or older on the day of the next election, and a United States citizen. There is no minimum period of time you are required to have lived in the state before being allowed to register.You may register as soon as you move into your new community.