| Official Name: | Castanea Township, Pennsylvania |
| Settlement Type: | Township |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Pennsylvania |
| Subdivision Type2: | County |
| Subdivision Name2: | Clinton |
| Established Title: | Settled |
| Established Title1: | Incorporated |
| Established Date1: | 1877 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 15.18 |
| Area Land Km2: | 14.28 |
| Area Water Km2: | 0.90 |
| Area Total Sq Mi: | 5.86 |
| Area Land Sq Mi: | 5.51 |
| Area Water Sq Mi: | 0.35 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 1095 |
| Population Density Km2: | 82.73 |
| Population Density Sq Mi: | 214.26 |
| Pop Est As Of: | 2021 |
| Population Est: | 1093 |
| Blank Name: | FIPS code |
| Blank Info: | 42-035-11640 |
Castanea Township is a township in Clinton County, Pennsylvania, United States. The population was 1,095 at the 2020 census.[2]
According to the United States Census Bureau, the township has a total area of 15.2km2, of which 14.3km2 is land and 0.9km2, or 5.94%, is water.[3] It is bordered to the north by the city of Lock Haven, the Clinton County seat.
As of the census[4] of 2000, there were 1,233 people, 516 households, and 372 families residing in the township. The population density was 221.6sp=usNaNsp=us. There were 531 housing units at an average density of 95.4sp=usNaNsp=us. The racial makeup of the township was 98.78% White, 0.08% African American, 0.65% Asian, 0.16% from other races, and 0.32% from two or more races. Hispanic or Latino of any race were 0.24% of the population.
There were 516 households, out of which 26.0% had children under the age of 18 living with them, 62.0% were married couples living together, 6.6% had a female householder with no husband present, and 27.9% were non-families. 21.3% of all households were made up of individuals, and 9.7% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.77.
In the township the population was spread out, with 20.0% under the age of 18, 7.9% from 18 to 24, 29.0% from 25 to 44, 25.8% from 45 to 64, and 17.3% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 93.6 males. For every 100 females age 18 and over, there were 91.3 males.
The median income for a household in the township was $33,657, and the median income for a family was $36,250. Males had a median income of $29,018 versus $20,721 for females. The per capita income for the township was $15,448. About 6.5% of families and 8.8% of the population were below the poverty line, including 7.5% of those under age 18 and 6.3% of those age 65 or over.