Available in: Professional, Enterprise, Performance, Unlimited and Developer Editions
By default, the Salesforce organizations can have up to 500 Roles or Territories by default. Sometimes this number might not be is not sufficient for their big company structures.
Salesforce Support can assist in increasing this limit as needed. The current Maximum is 10000.
We strongly encourage organizations to only request what is needed for their scenario and not the maximum limit.
Please Note: If you are using the Enterprise Territory Management (Territory Management 2.0) feature and you need an additional number of territories, please review the article Increasing the Maximum number of territories per territory model