With Halloween right around the corner, RealtyTrac decided to narrow down the 5 most haunted zipcodes in the U.S. Over 22,000 homes stand empty around the U.S. with their previous owners deceased. For reference, that's about one in every 5,973 houses nationwide. However, there are more than 20 areas where that ratio increases to one in 175. Check out the stats below profiling the most haunted housing markets across the United States.