Until today, the plate code in Maine remains 1 GA-9999 WA. Bar Harbor, Portland, Ogunquit, York, Camden, Boothbay Harbor, Old Orchard Beach, Rockport and Castine are great towns to spend your time while visiting Maine. The state is located in the New England region. As one of the northernmost states in the US, Maine operates an educational system that favors virtually everyone in the state. The population size of the state is 1,329,328 in 2015 and its ranked 42nd in the US.