Add more location level

OS Property supports 3 location levels: Country > State > City. We can't add deeper location level. In your case, if you use only one Country in the system. We can change Country to States, States to City, and City to Region/Area/District
Here are the solution:

1. Using PHPMyAdmin to remove all records in table: #__osrs_countries
2. Using PHPMyAdmin to add States (of your Country) to table: #__osrs_countries
3. Using tool: Manage States at Back-end of OS Property to enter District of your States
4. Using tool: Manage Cities at Back-end of OS Property enter Region of your Districts
5. Using Translation tool at Back-end of OS Property to change the words: Country to State, State to District and City to Region.
   Good luck