Pāhoa is a census-designated place (CDP) in the Puna District, Hawai‘i County, Hawai‘i, United States. The population was 962 at the 2000 census.
Pāhoa is located at 19°30′4″N 154°57′11″W / 19.50111°N 154.95306°W / 19.50111; -154.95306 (19.501031, -154.953037). According to the United States Census Bureau, the CDP has a total area of 2.3 square miles (5.9 km²), all of it land.
Soils underlying the Pāhoa area are volcanic in origin, deriving from the still active Kilauea Volcano. (Earth Metrics Inc., 1986) Kilauea is one of the Earth's most active volcanos, with the January, 2006 eruption being the longest rift zone eruption in Kilauea's 200 year recorded history. (Volcanology, 2007) The volcanic soils underlying Pāhoa are considered to have been generated by lava flows within the last 125 to 500 years. For example, the eruption of 1840 is known to have deposited lava flow within 1.5 miles (2.4 km) of Pāhoa. During the 1986 Earth Metrics survey an active lateral vent of Kilauea is located within three miles (5 km) of the village western perimeter. (Earth Metrics, 1986)