Bangladesh has a 7-tier administrative structure consisting of 7 divisions, 64 districts, 500 upazilas, 4,451 unions, and numerous villages. The key administrative units are:
1) Divisions, which are headed by Divisional Commissioners;
2) Districts, run by Deputy Commissioners;
3) Upazilas, the basic rural administrative unit headed by Upazila Executive Officers; and
4) Unions, the lowest rural administrative unit, headed by elected Union Parishad Chairmen.
This administrative structure provides the framework for governance and delivery of public services across Bangladesh.