Hopewell Township is located along the southeastern boundary of Beaver County.

It encloses the city of Aliquippa on three sides and the borough of South Heights to the southeast.

Where not shared with these two communities, the eastern boundary of the township follows the Ohio River.

Other borders include the townships of Independence to the southwest, Raccoon in the northwestern corner, Center to the north and northwest, and the Allegheny County townships of Crescent and Moon to the southeast.

25.4% of all households were made up of individuals, and 13.4% had someone living alone who was 65 years of age or older.

On September 8, 1994, USAir Flight 427 crashed in Hopewell Township, near the city of Aliquippa, as it was preparing to land at Pittsburgh International Airport, killing all 127 passengers and five crew members on board.