San Francisco is tops when it comes to trick-or-treating.  Zillow says the City by the Bay is number one for the third year in a row, followed by Boston, Honolulu, San Jose and Seattle.  San Francisco's Noe Valley, Sea Cliff, Cow Hollow, Presidio Heights and Glen Park neighborhoods are deemed to be prime targets for trick-or-treaters looking for top-quality candy and treats.  Zillow bases its rankings on home value index, population density, walk score and local crime data.  

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