Electric Vehicle Population Size History By County

This shows the number of vehicles that were registered by Washington State Department of Licensing (DOL) each month. The data is separated by county for passenger vehicles and trucks.

DOL integrates National Highway Traffic Safety Administration (NHTSA) data and the Environmental Protection Agency (EPA) fuel efficiency ratings with DOL titling and registration data to create this information.

Data and Resources

Additional Info

Field Value
Source https://data.wa.gov/resource/3d5d-sdqb
Author Department of Licensing
Last Updated December 17, 2025, 14:11 (UTC)
Created July 22, 2025, 20:09 (UTC)
1. A Battery Electric Vehicle (BEV) is an all-electric vehicle using one or more batteries to store the electrical energy that powers the motor and is charged by plugging the vehicle in to an electric power source. A Plug-in Hybrid Electric Vehicle (PHEV) is a vehicle that uses one or more batteries to power an electric motor; uses another fuel, such as gasoline or diesel, to power an internal combustion engine or other propulsion source; and is charged by plugging the vehicle in to an electric power source.
2. Vehicles registered with a military installation address may not have an assigned county. These vehicles are not included in the final counts.
3. Monthly count of vehicles for a county may change from this report and prior reports. Processes were implemented to more accurately assign county at the time of registration.
Category Transportation
Metadata Language English
Originator Research and Analysis Office, Department of Licensing
Period of Time Data includes historical Electric Vehicle population counts from January 2017 through November 2025.
Posting Frequency Monthly
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