Tableau can show you where the zip codes are but does not have a way to group the zip codes by county. You can find zip code / county mapping tables on the web and join them into your results to do this aggregation.

Note that zip codes may cross county boundaries so any such aggregation is only approximate.

Rebecca, I've been looking for the exact same thing, sadly for a few weeks. Showing my info by state is too broad but by zip code is too precise and sloppy. If you find something on the web that relates zip codes and counties and you could share that would be rad!

Thanks,

Paul

Here's a site with a free list that you could do a table join on:

http://www.populardata.com/downloads.html

Don't know where they got the data from, but it's free to use from their site with no restrictions.

Awesome! I couldn't get it to blend with my zip code data (because of all the Military and PO Box zip codes??) but I threw the Database in excel and ran a lookup up and all works well.

Thanks,

Paul