The Mechi Zone has Sikkim and West Bengal (India) to the east, Bihar (India) to the south, the Koshi Zone to the west and the Tibet Autonomous Region (People's Republic of China) to the north.

It is the smallest zone of the Eastern Development Region with an area of 8,196 km² (3,164 sq mi) and a population of only 1,422,182 people living there; Its population density is 173.5 persons/km².

The most important river in the Mechi Zone is the Mechi, tributary of the Mahananda River.
Another river is the Tamar River.

In the northern part of the zone, mainly in the Taplejung district that is in the eastern Himalayas, there are several high mountains.
The highest is Kanchenjunga (Nepali: कञ्चनजङ्घा Kanchanjaŋghā) that, with 8,586 m (28,169 ft) high, is the third highest mountain of the world; it is on the border with Sikkim and in the Kanchanjungha Conservation Area.
The Mechi Zone has Sikkim and West Bengal (India) to the east, Bihar (India) to the south, the Koshi Zone to the west and the Tibet Autonomous Region (People's Republic of China) to the north.
It is the smallest zone of the Eastern Development Region with an area of 8,196 km² (3,164 sq mi) and a population of only 1,422,182 people living there; Its population density is 173.5 persons/km².
The most important river in the Mechi Zone is the Mechi, tributary of the Mahananda River. Another river is the Tamar River.
In the northern part of the zone, mainly in the Taplejung district that is in the eastern Himalayas, there are several high mountains. The highest is Kanchenjunga (Nepali: कञ्चनजङ्घा Kanchanjaŋghā) that, with 8,586 m (28,169 ft) high, is the third highest mountain of the world; it is on the border with Sikkim and in the Kanchanjungha Conservation Area.
Mechi Zone