A good general name for the entire group of such regions would be administrative division. The linked Wikipedia article has a comprehensive list, which also includes towns and cities, neighborhoods, an the like. The differences between these divisions all come down to:

1. Size of the region
2. Type of government
3. Local language/naming conventions

A good general name for the entire group of such regions would be administrative division. The linked Wikipedia article has a comprehensive list, which also includes towns and cities, neighborhoods, an the like. The differences between these divisions all come down to:

1. Size of the region
2. Type of government
3. Local language/naming conventions