1. Gerald Cavendish Grosvenor and Family – $11.4 Billion
Gerald Cavendish Grosvenor is the United Kingdom’s richest landowner, as well as the 6th Duke of Westminster. He owns real estate all over the world spanning five continents. One of his valuable assets includes Belgravia, one of London’s most expensive neighbourhoods; the Grosvenors own more than 190 acres of land in this prime area of one of the world's major capitals. In Belgravia, homes can sell for $150 million. The Duke's family also owns 96,000 acres of Scotland and at least 32,000 acres in England - making this man the richest - and arguably one of the most powerful - in the United Kingdom.