Paauilo (Hawaiian: Paʻauilo) is a census-designated place (CDP) in Hawaiʻi County, Hawaii, United States. The population was 595 at the 2010 census.
Paauilo is located on the northeast side of the island of Hawaiʻi at 20°2′38″N 155°22′13″W (20.043769, -155.370323). Hawaii Route 19 passes through the community, leading southeast 34 miles (55 km) to Hilo and west 21 miles (34 km) to Waimea.
According to the United States Census Bureau, the CDP has a total area of 1.1 square miles (2.8 km2), of which 1.0 square mile (2.7 km2) is land and 0.0 square miles (0.1 km2), or 4.14%, is water.
As of the census of 2000, there were 571 people, 191 households, and 141 families residing in the CDP. The population density was 496.3 people per square mile (191.7/km²). There were 198 housing units at an average density of 172.1 per square mile (66.5/km²). The racial makeup of the CDP was 15.06% White, 0.18% African American, 0.70% Native American, 41.68% Asian, 5.60% Pacific Islander, 0.88% from other races, and 35.90% from two or more races. Hispanic or Latino of any race were 13.49% of the population.
There were 191 households out of which 31.4% had children under the age of 18 living with them, 53.4% were married couples living together, 14.1% had a female householder with no husband present, and 25.7% were non-families. 20.9% of all households were made up of individuals and 10.5% had someone living alone who was 65 years of age or older. The average household size was 2.99 and the average family size was 3.50.