The Jabez Knowlton Store is a historic commercial building on Maine State Route 9 in Newburgh, Maine. Built in 1839, it is a well-preserved example of commercial Greek Revival architecture in a rural context. It is more significant for its well-preserved collection of goods dating to the early 20th century, preserved by the Knowlton family after the store's last proprietor died in 1910. The property, open by appointment as a museum, was listed on the National Register of Historic Places in 1978.