Volcano is a census-designated place (CDP) in Hawaii County, Hawaii, United States located in the District of Puna with a small portion of the CDP in the District of Kaʻū. The population was 2,575 at the 2010 census, up from 2,231 at the 2000 census.
Volcano is located on the east side of the island of Hawaiʻi, on the border of Hawaii Volcanoes National Park and near the northeast rim of Kīlauea's summit caldera.
According to the United States Census Bureau, the CDP has a total area of 58.6 square miles (151.7 km2), all of it land. Hawaii Route 11 passes through the southern part of the community, leading northeast 27 miles (43 km) to Hilo and southwest 37 miles (60 km) to Nāʻālehu.
Owing to its altitude, ranging from below 2,800 feet (850 m) in the southeast to over 6,200 feet (1,900 m) at its uninhabited northern end, Volcano features a subtropical highland climate (Köppen Cfb), with relatively uniform temperatures and abundant rainfall throughout the year, although rainfall is concentrated during the months of November through April.
As of the census of 2010, there were 2,575 people in 1,228 households residing in the CDP. The population density was 45.4 people per square mile (17.5/km2). There were 1,740 housing units at an average density of 30.7 per square mile (11.9/km2). The racial makeup of the CDP was 51.53% White, 0.74% African American, 0.39% American Indian & Alaska Native, 11.57% Asian, 9.79% Native Hawaiian & Pacific Islander, 0.43% from other races, and 25.55% from two or more races. Hispanic or Latino of any race were 8.82% of the population.
There were 1,228 households, out of which 17.6% had children under the age of 18 living with them.