As of 2011 India census, Chengalai had a population of 15,800 with 7,462 males and 8,338 females. Chengalai village spreads over an area of 21.18km2 with 3,270 familiesresiding in it. The male femalesex ratio was 1,117 higher than state average of 1,084. In Chengalai, 12.5% of the population was under 6 years age. Chengalai had overall literacy of 92.7% lower than state average of 94%.