How to unhide a contact address in Google Maps? I accidentally hid a contact on Google Maps, thereby removing his/her address on the map. How do I undo this action?
According to solutions given Google Maps Help forum, you can try deleting the contact and then re-adding it.


  It is presumed that these settings are  stored in the Contacts App on your
  phone, not the Maps app.


Thus perfoming the above mentioned workaround will then override the "hide" option.

Additionally you may need to resync the information to Google servers.