The research, which was carried out by London and Partners, found that the city's museums make up the top three most googled museums in the world with the Science Museum leading the results.
It stated that the Natural History Museum was the second-most searched for and the British Museum was third.
"London is without a doubt the cultural capital of the world. Tourists are flocking to our great city in ever-increasing numbers, drawn by our exceptional cultural attractions and landmarks," London Mayor Boris Johnson said.
Figures showed that London's theatres also generate more searches than those in any other city and the British capital is the most searched for city in the world to visit.
The New York Metropolitan Museum of Art and the Smithsonian Museum in Washington DC are ranked 4th and 5th respectively.