As of the census of 2000, there were 633 people, 243 households, and 184 families residing in the township.

The population density was . There were 365 housing units at an average density of 19.3/sq&nbsp;mi (7.4/km<sup>2</sup>).

The racial makeup of the township was 97.16% White, 0.95% African American, 0.47% Native American, 0.32% Asian, and 1.11% from two or more races.

There were 243 households, out of which 30.5% had children under the age of eighteen living with them; 66.7% were married couples living together, 4.9% had a female householder with no husband present, and 23.9% were non-families. 20.2% of all households were made up of individuals, and 5.3% had someone living alone who was sixty-five years of age or older.

The average household size was 2.60 and the average family size was 3.03.

In the township the population was spread out, with 24.3% under the age of eighteen, 6.2% from eighteen to twenty-four, 29.4% from twenty-five to forty-four, 25.9% from forty-five to sixty-four, and 14.2% who were sixty-five years of age or older. The median age was forty-one years.

For every one hundred females, there were 104.9 males. For every one hundred females who were aged eighteen or older, there were 104.7 males.

The median income for a household in the township was $37,188, and the median income for a family was $43,438. Males had a median income of $29,219 compared with that of $21,607 for females.

The per capita income for the township was $16,468.

Roughly 4.4% of families and 5.2% of the population were living below the poverty line, including 3.2% of those who were under the age of eighteen and 9.5% of those who were aged sixty-five or older.

References

  • Highland Township listing at Clarion County Association of Township Officials