Just like people, some of America's 3,141 counties are doing better than others. Not to make your home county feel jealous or anything, but here are the 10 richest counties in America. This is determined by looking at the median household income in each county. Just for reference, the average median household income in the US is $46326 according to the last Census, while all these counties fall from almost $100,000 and beyond. And if you do happen to hail from one of these spots, congratulations! Try bringing it up at a party and see what happens. And always you can see lots of incredible mansions and estates in our celebrity homes section!