Sergei if you will post a workbook with the...
... no trouble in creating a map based on zip codes for the US, and one based on postal codes for Canada
...in it, I'll help you figure out how to display both at the same time.
--Tableau Tableua (aka Shawn)
If you have a field to indicate which postal code is which country, then you can use that to set the location for.
If go you to edit location, and then to the country drop down, you can set the location as fixed or you can chose "from field". If you chose "from field" and have a field filled with "US" or "Canada", the map will fill fine I think.
Hope this helps,
Thank you Dana, that worked like a charm!