Sarpang covers a total area of 1,946 km2 (751 sq mi)[2] and stretches from Lhamoizhingkha in West Bhutan to Manas National Park in the east.

The East Bodish Kheng language is also spoken in the northeastern reaches of the district.

Far western Sarpang District (the gewog of Senghe) contains part of the uninhabited Phibsoo Wildlife Sanctuary along the India border; northern Sarpang District (the gewog of Jigmechhoeling) is part of Jigme Singye Wangchuck National Park; eastern and southeastern Sarpang District (the gewogs of Jigmechhoeling, Tareythang and Umling) lie within Royal Manas National Park.

Sarpang is bisected by a wide swath of biological corridor connecting all three environmentally protected areas.

[3][4] On April 26, 2007, Lhamoy Zingkha Dungkhag (sub-district) was formally transferred from Sarpang Dzongkhag to Dagana Dzongkhag,[5] affecting the town of Lhamozingkha and three gewogs – Lhamoizingkha, Deorali and Nichula Gewogs (Zinchula) – that formed the westernmost part of Sarpang and became the southernmost part of Dagana.