Pennellville Historic District /ˈpɛnɪlvɪl/ is a residential district located in Brunswick, Maine. To locals, the neighborhood is known simply as "Pennellville." Pennellville is significant for two main reasons: it has several historic ship captains' mansions, and much of the real estate is waterfront property. The real estate in Pennellville is some of the most expensive in the state of Maine.