| Official Name: | Fern Forest, Hawaii |
| 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: | 32.31 |
| Area Land Km2: | 32.31 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 12.47 |
| Area Land Sq Mi: | 12.47 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 1150 |
| Population Density Km2: | 35.60 |
| Population Density Sq Mi: | 92.20 |
| Timezone: | Hawaii-Aleutian |
| Utc Offset: | -10 |
| Coordinates: | 19.4722°N -155.13°W |
| Elevation M: | 690 |
| Elevation Ft: | 2264 |
| Postal Code Type: | ZIP code |
| Postal Code: | 96785[2] |
| Area Code: | 808 |
| Blank Name: | FIPS code |
| Blank Info: | 15-07675 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1852578 |
Fern Forest is a census-designated place (CDP) in Hawaiʻi County, Hawaiʻi, United States, located in the District of Puna. The population was 1,150 at the 2020 census. The population increased by 94.0% to 931 at the 2010 census.[3]
Fern Forest is located at 19.4722°N -155.13°W (19.472132, -155.130135).[4]
According to the United States Census Bureau, the CDP has a total area of 12.5sqmi, all of it land.
As of the census[5] of 2010, there were 931 people and 399 households residing in the CDP. The population density was 74.5sp=usNaNsp=us. There were 460 housing units at an average density of 23.1/mi2. The racial makeup of the CDP was 49.30% White, 0.75% African American, 0.86% American Indian & Alaska Native, 7.84% Asian, 10.63% Native Hawaiian & Pacific Islander, 0.64% from other races, and 29.97% from two or more races. Hispanic or Latino of any race were 13.53% of the population.[3]
There were 399 households, out of which 20.1% had children under the age of 18 living with them. The average household size was 2.33.[3]
In the CDP the population was spread out, with 21.4% under the age of 18, 7.5% from 18 to 24, 11.6% from 25 to 34, 19.4% from 35 to 49, 31.5% from 50 to 64, and 8.6% who were 65 years of age or older. For every 100 females, there were 117.5 males. For every 100 males there were 85.1 females.[3]
The median income for a household in the CDP at the 2000 census was $24,519, and the median income for a family in 2000 was $33,125. Males had a median income of $40,125 versus $28,333 for females in 2000. The per capita income for the CDP was $14,958 in 2000. About 18.3% of families and 25.5% of the population were below the poverty line in 2000, including 10.3% of those under age 18 and 36.8% of those age 65 or over.