Northumberland County Courthouse is a historic county courthouse located at Sunbury, Northumberland County, Pennsylvania. It was built in 1865, and is a three-story, brick building in the Italianate style. A three-story wing was added in 1911. It features three arched doors on the front facade, brownstone quoins at the corners, and a clock tower with a copper dome. The tower bell was donated by Simon Cameron. In 1878, it was the site of the murder trial and conviction of the last Molly Maguire, Peter McManus.It was added to the National Register of Historic Places in 1974.
