Ni‘ihau is the smallest inhabited island in Hawai‘i but nearly twice as large as uninhabited Kaho‘olawe. It is roughly 18 miles long and from 3 to 6 miles wide with a total area of approximately 70 square miles. The elevation of Pānī‘au, its highest peak, is only 1280 feet, which—along with being in the rain shadow of neighboring Kaua‘i—explains the arid climate of the island. Its population was 84 in 2020.
Lehua Island is a small, crescent-shaped island in the Hawaiian islands, 0.7 miles (1.1 km) north of Ni'ihau, due west of Kauai. The uninhabited, 279-acre (1.13 km2) barren island is a tuff cone which is part of the extinct Ni'ihau volcano.