| Official Name: | Papaikou, Hawaii |
| Native Name: | Pāpaʻikou |
| Settlement Type: | Census-designated place |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Hawaii |
| Subdivision Type2: | County |
| Subdivision Name2: | Hawaii |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.62 |
| Area Land Km2: | 3.77 |
| Area Water Km2: | 1.85 |
| Area Total Sq Mi: | 2.17 |
| Area Land Sq Mi: | 1.45 |
| Area Water Sq Mi: | 0.71 |
| Population As Of: | 2020 |
| Population Total: | 1166 |
| Population Density Km2: | 309.65 |
| Population Density Sq Mi: | 801.93 |
| Timezone: | Hawaii-Aleutian |
| Utc Offset: | -10 |
| Coordinates: | 19.7939°N -155.0967°W |
| Elevation M: | 72 |
| Elevation Ft: | 236 |
| Postal Code Type: | ZIP code |
| Postal Code: | 96781 |
| Area Code: | 808 |
| Blank Name: | FIPS code |
| Blank Info: | 15-61550 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 0363121 |
Papaikou (Hawaiian: Pāpaʻikou) is a census-designated place (CDP) in Hawaii County, Hawaii, United States, and is a few miles north of the county seat, Hilo. The population of Papaikou was 1,314 at the 2010 census,[2] down from 1,414 at the 2000 census.
Papaikou is located on the east side of the island of Hawaii at 19.7939°N -155.0967°W (19.794022, -155.096531).[3] Hawaii Route 19 passes through the community, leading south 5miles to Hilo and northwest to Honokaa.
According to the United States Census Bureau, the Papaikou CDP has a total area of 4.9km2, of which 3.7km2 are land and 1.1km2, or 23.03%, are water.[2] The CDP borders the Pacific Ocean from Hokeo Point in the north to Kekiwi Point in the south.
Papaikou has a tropical rainforest climate (Af) with heavy rainfall year-round.
At the 2000 census there were 1,414 people, 475 households, and 363 families in the CDP. The population density was 964.3sp=usNaNsp=us. There were 502 housing units at an average density of 342.4sp=usNaNsp=us. The racial makeup of the CDP was 15.28% White, 0.50% African American, 0.07% Native American, 45.83% Asian, 9.41% Pacific Islander, 1.41% from other races, and 27.51% from two or more races. Hispanic or Latino of any race were 6.86%.[4]
Of the 475 households 29.5% had children under the age of 18 living with them, 52.8% were married couples living together, 14.7% had a female householder with no husband present, and 23.4% were non-families. 19.4% of households were one person and 10.7% were one person aged 65 or older. The average household size was 2.98 and the average family size was 3.35.
The age distribution was 24.2% under the age of 18, 7.8% from 18 to 24, 24.8% from 25 to 44, 23.2% from 45 to 64, and 20.1% 65 or older. The median age was 40 years. For every 100 females, there were 97.2 males. For every 100 females age 18 and over, there were 96.3 males.
The median household income was $37,031 and the median family income was $40,446. Males had a median income of $25,000 versus $24,205 for females. The per capita income for the CDP was $13,782. About 12.1% of families and 15.0% of the population were below the poverty line, including 18.0% of those under age 18 and 7.6% of those age 65 or over.