Formed in 1848 from part of Branch Township, it is named for Lewis Cass.

28.9% of all households were made up of individuals, and 15.9% had someone living alone who was 65 years of age or older.

Cass Township has the highest percentage of people of Ukrainian ancestry (14.30%) in the United States.

[citation needed] The 1957 Cass Township, high school football team exclusively used single-wing offense, now referred to as "wildcat" .

They are the only known high school football team in Pennsylvania that can lay claim to being unbeaten, untied, and unscored upon.