Hi William Hampton,
This thread is a month old, sorry for the delay in coming back to you.
Is your query solved or do you still require assistance?
Our community could help you regarding this question.
Assuming that zip-code, region and division is in your data set or view from the database.
In Tableau 10, simply right click on division or region and select Geographic Role > Create From > Zip Code. This will allow you to have a filled map as well.
Let us know if you have any other questions.