Bill Gates – Washington – $147.5 Million
Bill Gates is one story of success that will be told to the aliens when we find them. His estimated net worth of $89 billion is more than the combined net worth of some of our richest celebs and is actually bigger than some countries’ GDP (beat that). His prolific bank account allowed him to take hold of this gigantic $147.5-million Washington mansion. The house spreads over 66,000 square feet, and the library in it would put to shame some real bookworms. And yes, there’s just about every gadget that you can (and cannot) dream of!