What you should know about London if you are moving there: The estimated population, as of 1 January 2005, was 7,421,228 in Greater London, and several million more in London's metropolitan area easily making London the largest city in the UK. Its population includes a very diverse range of peoples, cultures, and religions, making it one of the most cosmopolitan cities in Europe, and the world. Many of the world's wealthiest people are also permanent or temporary residents.