Welcome to the Borough of Pen Argyl. Pen Argyl Municipal Building is located at 11 N. Robinson Avenue, Pen Argyl, PA 18072 Pen Argyl, a town of 3600 residents, is located in Northampton County, PA, and is near Routes 33 and 80 at the foothills of the Blue Ridge Mountain and the Appalachian Trail. Our community began in 1853 when Joseph Kellow discovered slate. Pen Argyl received its name from a Welsh word meaning “head” and from the Anglo-Saxon word “argylite” meaning slate rock. With the influx of quarrymen from Cornwall, England, the town began to grow and was incorporated in 1882 and became part of the area known as the Slate Belt. Currently there is still one slate quarry that is still in operation. The quarrymen and their families brought with them the baking of “pasties”, a beef meat pie, which was the popular food to take to work in the quarries. Pasties can still be bought today at Mr. Pasties located in Pen Argyl. Today Pen Argyl is known for its historic Dentzel carousel which is housed at Weona Park. This carousel was purchased in 1923 and is one of the few remaining Dentzel carousels that has stationary wooden animals. The carousel is open for rides during the summer park season.