Geographically Taplejung is a mountainous district where the world's third highest peak
Kanchenjunga (8586 m) is located. It is situated at elevation ranging from to from sea level. The
Tamor River is a main river in the district, which flows through the middle in the district dividing district in east and west Taplejung. Gunsa river, Simbuwa river and the many tributaries of Tamur are important sources of freshwater. There are more than 60 rivers and streams in the district. Some glacial lakes are: Sinjenma Pokhari, Samdo Pokhari, Tin Pokhari, Kali Pokhari etc. The district includes many highest peaks e.g. Gimmigela (7350 m), talung (7349 m), Kabru (7276 m), Nepal peak (7177 m), Kumbhkarna (7025 m) etc.
Kanchenjunga Conservation Area is a protected area in the district which covers an area of . ==Demographics==