Physiographically, this area forms the Kalimpong Range, with the average elevation varying from 300 to 3,000 metres (980 to 9,840 ft).

According to the 2011 Census of India, Kumai Tea Garden had a total population of 3,907 of which 1,968 (50%) were males and 1,939 (50%) were females.

The total number of literate people in Kumai Tea Garden was 2,790 (79.90% of the population over 6 years).

It is close to many of the tourist destinations such as Chapramari, Gorumara, Samsing, Gorubathan, Suntalekhola and Jhalong.

This small town has hills, forests and rivers and several places for sightseeing – Kumai peak, Gudaray view point, Buddhist stupa and a tea garden.