Between 2009 and 2023, 625,234 electric cars were registered in the area, with West Yorkshire coming third behind Outer London (908,775) and Greater Manchester (1,045,910).
Using data sourced from the Department for Transport and Driver and Vehicle Licensing Agency, insurance experts Howden Insurance calculated the total number of plug-in cars registered in each UK area between 2009 and 2023.
The rest of the top five is made up of Inner London and West Midlands.
A spokesperson for Howden Insurance said: “With greater awareness of the impact of petrol and diesel vehicles on the planet, many local authorities are proposing to introduce clean air schemes.
“With the cost-efficiency of electric cars and local governments introducing EV benefits, interest in electric vehicles or low-emission vehicles has soared in the UK.
“Areas such as the West Midlands and West Yorkshire have Clean Air Zones in Birmingham and Bradford, so these areas have invested more in EV charging points than other areas have done in order to accommodate electric vehicles.”