title: Google Maps API: adding zip code boundaries
body: <p>I'm using the Google Maps JS API to place some markers on a map.  The code is very simple. I just create the map using "new google.maps.Map" and then create each marker with "new google.maps.Marker".</p>
  
  <p>In addition to displaying the markers, I aso want the map to display the boundaries of one particular US zip code.  I've found that the Google Maps website will display the boundaries of a single US zip code if you go to a URL that looks like <a href="https://www.google.com/maps/place/14618" rel="nofollow">https://www.google.com/maps/place/14618</a> or <a href="https://www.google.com/maps/place/94703" rel="nofollow">https://www.google.com/maps/place/94703</a>.</p>
  
  <p>Can anyone show me how to use the Google Maps API to display US zip code boundaries?</p>