According to the
2011 census Siaha district has a
population of 56,574, roughly equal to the island of
Greenland. This gives it a ranking of 628th in India (out of a total of
640). The district has a population density of . Its
population growth rate over the decade 2001-2011 was −7.34%; the only district in Mizoram to have decreased population. Siaha has a
sex ratio of 979
females for every 1000 males, and a
literacy rate of 90.01%. 44.38% of the population lives in urban areas. Scheduled Tribes make up 96.59% of the population. The majority of the district inhabitants are
Mara people, who also have an autonomous district council called
Mara Autonomous District Council composed of the two R.D. Blocks of Siaha and Tuipang. According to the 2011 census, 72.14% of the population spoke
Mara, 16.77%
Mizo, 5.36%
Pawi, 1.04%
Hindi and 0.93%
Bengali as their first language. ==Flora and fauna==