The 90210 ZIP has been named the nation’s fourth richest  postal code for 2011, according to Businessweek.com. The report lists the average household income in the 90210 ZIP as $278,757, with an average household net worth of $1,504,166. Though Beverly Hills has five ZIP codes—90209, 90210, 90211, 90212, 90213—the popular television show  Beverly Hills, 90210  helped the city become synonymous with the 90210 ZIP. The 90210 ZIP stretches from Wilshire Boulevard to the Trousdale Estates. It also includes a portion of Los Angeles north of the Beverly Hills border known as the Beverly Hills Post Office. BHPO residents get to use the famous ZIP, but they are not a part of the Beverly Hills election process or school system. The highest-ranked West Coast ZIP on Businessweek.com’s list, 90210 fell behind 33480 (Palm Beach, Fla.), 11568 (Old Westbury, N.Y.) and 60043 (Kenilworth, Ill.).  To read the full article on Businessweek.com, click here . Be sure to follow Beverly Hills Patch on  Twitter  and “Like” us on  Facebook . See original here: The 90210 ZIP Code Is Among the Richest in America