The population was 659 at the 2020 census,[2] a decrease from the figure of 689 tabulated in 2010.

[3] As of the 2000 census,[5] there were 749 people, 299 households, and 226 families residing in the township.

There were 299 households, out of which 26.1% had children under the age of 18 living with them, 62.2% were married couples living together, 8.0% had a female householder with no husband present, and 24.1% were non-families.

21.1% of all households were made up of individuals, and 10.0% had someone living alone who was 65 years of age or older.

Burrell Township appears in the 1876 Atlas of Armstrong County, Pennsylvania.