At the 2000 census there were 395 people, 180 households, and 113 families living in the township.
The population density was . There were 202 housing units at an average density of 16.5/sq mi (6.4/km<sup>2</sup>).
The racial makeup of the township was 99.24% White, 0.25% African American and 0.51% Asian. Hispanic or Latino of any race were 0.25%.
Of the 180 households, 21.1% had children under the age of eighteen living with them; 41.7% were married couples living together, 12.8% had a female householder with no husband present, and 37.2% were non-families. 33.9% of households were one person and 20.0% were one person aged sixty-five or older.
The average household size was 2.19 and the average family size was 2.76.
The age distribution was 17.2% of residents who were under the age of eighteen, 5.1% who were aged eighteen to twenty-four, 26.3% who were aged twenty-five to forty-four, 25.6% who were aged forty-five to sixty-four, and 25.8% who were aged sixty-five or older. The median age was forty-six years.
For every one hundred females, there were 98.5 males. For every one hundred females who were aged eighteen or older, there were 98.2 males.
The median household income was $24,583 and the median family income was $32,917. Males had a median income of $29,167 compared with that of $23,125 for females.
The per capita income for the township was $14,716.
Approximately 5.5% of families and 6.0% of the population were living below the poverty line, including 3.5% of those who were under the age of eighteen and 5.9% of those who were aged sixty-five or older.
Gallery
<gallery>
File:Wadesville War Memorial, New Castle Twp, Schuylkill Co PA 01.JPG|Wadesville War Memorial.
File:Wadesville, New Castle Twp, Schuylkill Co PA 01.JPG|Village of Wadesville.
File:St Boniface Cemetery, New Castle Twp, Schuylkill Co PA 01.JPG|St. Boniface German Cemetery and Arnots Addition.
</gallery>