A district of Uttarakhand state is an administrative geographical unit, headed by a Deputy Commissioner (earlier called District Collector) or District Magistrate, an officer belonging to the Indian Administrative Service. The deputy commissioner and the district magistrate are assisted by a number of officers (such as deputy collector, assistant collector, assistant district magistrate, tehsildar, deputy (naib) tehsildar) belonging to Uttarakhand Civil Service and other Uttarakhand state services.