The Blue Ball Barn Folk Art Museum is an agricultural and folk art museum in Wilmington, Delaware. It is located inside and as a part of the Alapocas Run State Park.

The Blue Ball Barn Folk Art Museum features a beautifully restored barn that was built by Alfred I. DuPont in 1914. It was named after the Blue Bell Tavern, which is a historic inn and meeting house that once stood near the property. The museum serves as a permanent home to the Delaware Folk Art Collection and as a great example of preservation and adaptive use of a noted historic structure.

The Blue Ball Barn Folk Art Museum is open daily, all year round, except on major holidays. It is also available for events rentals, being equipped with multifunctional spaces.