California had 8.64 plug-in vehicle (PEV) registrations per 1,000 people in 2017, followed by Hawaii with 5.12, and Washington state with 4.06, according to the US Department of Energy (DOE). PEVs include both all-electric vehicles and plug-in hybrid vehicles.
Other states with PEV registrations per 1,000 people greater than two were Oregon, Vermont, Colorado, Arizona, and Maryland.
Seventeen states plus the District of Columbia were between one and two PEV registrations per 1,000 people, while 25 states were below one. The average for the United States is 2.21 PEV registrations per 1,000 people.
