Audi delivered 873 electric SUVs in October, ahead of Volkswagen Golf in second place with 748 cars, according to the Norwegian Road Federation.
In total, 35.7% of all cars sold in Norway last month were electric.
Norway is seen as a bellwether for the EV market. Seeking to end the sale of combustion-engine cars by the middle of the next decade, Norway exempts battery-powered vehicles from taxes imposed on petrol and diesel engines.
Tesla's Model 3 sales fell to a market share of just 1.2% in October, but the car still remains the country's top-selling car year-to-date.