Here's how to filter to show contacts in one city:
- Go to the main Contact list by selecting "Contacts" in the navigation bar.
- In the page menu on the left, select "Add a filter" below the "Filters & Sorting" section.
- In the dialog that appears, choose "Address - city" "contains" and then enter the desired city name.
- Apply the filter to see all of the contacts and companies in that particular city.