What climate zone has the fewest people living in?

I’d say the Arctic, have a great day!

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).

Answerstratovolcanoes///near or in the ring of fire;