The former Hancock Central High School on Quincy Street is now listed on the National Register of Historic Places.
The National Park Service sent a letter to the city of Hancock dated July 31st to inform them of their decision.
The previous historic district ended at City Hall and did not include the school.
The designation will open up grant funding and tax credit opportunities for the location, which is now owned by Finlandia University.
The property was deemed worthy of preservation because of its importance in American history and culture.