Perhaps the most famous U.S. ZIP code is the one immortalized in the TV show “Beverly Hills, 90210,” which was considered synonymous with wealth. Real estate transactions can be tracked by ZIP code, making it easy to pinpoint the most expensive places to live in each state. Sorry, 90210, but you aren’t the priciest in California—that distinction goes to 90077 in Los Angeles, with a median list price of $9,850,000. The nation’s most expensive is 33109 in Miami Beach, with a median list price of $12,450,000. Sources: Realtor.com, United States Postal Service.