Has anybody created a community that spans different towns or is subdivided by town? What's the best way to go about this on Tribe?

Hi @Chris Livadas38. We don't have the "map/location" feature on our product yet. However, to differentiate your users or contents based on the cities, you have two options:

1. Create a "Topic" for each city and then add the most important cities to the left navigation menu37. 
2. Create a "Group" for each city, where your users can join to each city group to receive notifications when there is a new post. 

To know about the difference between Topics and Groups, please check out this answer58.