At the time of the 2000 census, there were 1,802 people, 797 households, and 536 families living in the township.

There were 838 housing units at an average density of 374.3 per square mile (144.5/km2).

The racial makeup of the township was 99.61% White, 0.06% African American, and 0.33% from two or more races.

28.4% of households were made up of individuals, and 11.5% were one person aged 65 or older.

Springdale Township is served by the Allegheny Valley School District, which utilizes Springdale Jr-Sr High School.