蒙土尔县（Montour County, Pennsylvania）是美国宾夕法尼亚州中部的一个县。面积343平方公里。根据美国2000年人口普查，共有人口18,236。县治丹维尔。

成立于1850年5月3日，县名纪念易落魁部落领袖凯瑟琳·蒙土尔。

Montour County is a county located in the U.S. state of Pennsylvania. As of the 2010 census, the population was 18,267. Its county seat is Danville. The county is named for Andrew Montour, a prominent Métis interpreter who served with George Washington during the French and Indian War. It encompasses 132 sq mi, making it the smallest county by land area in the state.