Harrogate people are more likely to switch energy providers than anywhere else in England.
Comparison website Uswitch based the finding on analysis of how often residents changed their gas or electric supplier over the past 20 years.
Harrogate topped the table with 196 switches per 1,000 people, whereas London was bottom with only 116 per 1,000.
London is believed to be last because more people rent than own their own property and are therefore less inclined to switch.
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Will Owen, energy expert at Uswitch.com, said:
“Northerners are showing southerners how it’s done when it comes to switching, with Harrogate residents switching at twice the rate of those in central London.
“Yorkshire residents are earning their reputation for being frugal, with five locations in the top ten being from God’s Own Country.”
Leeds was fourth, with 182 people switching per 1,000.
According to government energy regulator Ofgem, households can save on average £300 a year by switching energy providers.