Jacob Arndt House and Barn is a historic home and Pennsylvania barn located at Williams Township, Northampton County, Pennsylvania. The property includes a Federal style limestone house built about 1810 with an addition completed about 1840, a large stone and wood Pennsylvania barn built about 1840, a stone carriage house built about 1890, and the ruins of an out kitchen built about 1810. The house features an entrance portico with an elliptical pediment, slate covered gable roof, and two gable-end brick chimneys.It was added to the National Register of Historic Places in 2005.