克拉里恩县（Clarion County, Pennsylvania）是美国宾夕法尼亚州西北部的一个县。面积1,577平方公里。根据美国2000年人口普查，共有人口41,765。县治克拉里恩。

成立于1839年3月11日，县名来自同名的河。

Clarion County is a county located in the U.S. state of Pennsylvania. As of the 2010 United States Census, the population was 39,988. Its county seat is Clarion. The county was formed on March 11, 1839, from parts of Venango and Armstrong counties. Clarion county is entirely defined as part of the Pittsburgh media market.