Centennial Building, Historic government building in Port St. Joe, Florida.

The Centennial Building is a rectangular government structure in Port St. Joe, Florida, displaying classical architectural features from its era of construction. It shows simple, functional design elements typical of public buildings from its time period.

The building was constructed during a period when Port St. Joe was establishing and formalizing its local government structures. Its listing on the National Register of Historic Places reflects its importance to the city's architectural and administrative history.

The building reflects the role local government played in shaping Port St. Joe's development over time. People see it today as a symbol of community continuity and civic identity.

The exterior and main features are visible from the street and can be viewed during regular business hours. The downtown area of Port St. Joe is easy to navigate, and the building sits near other historical sites.

In 2024 the Centennial Building was remodeled with roof, joist and flooring repairs after years of termite and water damage. The building at 300 Allen Memorial Way, across from the Constitution Convention Museum State Park, hosts events such as prom, First Baptist Church's Fifth Sunday and Port Saint Joe Junior Service League gatherings.