Which eight-thousander is the lowest by elevation?

Shishapangma is the lowest-elevation eight-thousander.

Its summit rises to about 8,027 metres above sea level, making it the 14th and lowest member of the standard group of fourteen eight-thousanders. The group is defined by peaks exceeding 8,000 metres with sufficient topographic independence, rather than by height alone. Shishapangma is also known as Xixabangma and is located entirely within the Tibet Autonomous Region of China.

The mountain stands in the Jugal Himal, close to the Nepal border, and is the only eight-thousander situated wholly within Tibet. Its northern setting gives it less dramatic vertical relief than many Himalayan peaks, although it remains an extreme high-altitude climb. The name has competing explanations, including interpretations connected with grassy plains and local Tibetan expressions.

Shishapangma was the last of the fourteen standard eight-thousanders to be climbed. A Chinese expedition led by Xu Jing made the first ascent on 2 May 1964. Climbers sometimes distinguish between its lower western or central summits and the true main summit, which has caused disputes over some claimed ascents.