Zhigansky District (; ) is an administrative and municipal district (raion, or ulus), one of the thirty-four in the Sakha Republic, Russia. It is located in the northern central part of the republic and borders with Bulunsky District in the north, Eveno-Bytantaysky National District in the east, Kobyaysky District in the southeast, Vilyuysky District in the southwest, and with Olenyoksky District in the northwest. The area of the district is . Its administrative center is the rural locality (a selo) of Zhigansk. Population: 4,312 (2002 Census); The population of Zhigansk accounts for 79.6% of the district's total population.
The main river in the district is the Lena. Some of its important tributaries, such as the Menkere, Muna, Khoruongka, Nuora (Strekalovka), Kyuelenke and Motorchuna, have their mouth in the area of the district. The largest lake is Lake Ulakhan-Kyuyol.
Average January temperature ranges from in the east to in the west and average July temperature ranges from to . Annual precipitation ranges from in the west to in the east.
The district was established on December 10, 1930.
As of the 2021 Census, the ethnic composition was as follows:
<small>Divisional source:</small><br /> <br/> <small>*Administrative centers are shown in bold</small><br/>