凯霍加县（英语：Cuyahoga County, Ohio）是位于美国俄亥俄州东北部的一个县，北傍伊利湖。面积1,386平方公里。根据美国2000年人口普查，共有人口1,393,978，是全州人口最多的县。县治克里夫兰。

成立于1810年，县名来自凯霍加河 （可能出自阿尔冈昆语，意思是「弯曲的河」）。

Cuyahoga County (/ˌkaɪ.əˈhɒɡə/ or /ˌkaɪ.əˈhoʊɡə/ KY-ə-HOG-ə or KY-ə-HOH-gə) is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 1,280,122, making it the most populous county in Ohio. Its county seat is Cleveland. In 2014, the county's estimated population was 1,259,828. The county is named after the Iroquoian word Cuyahoga, which means 'crooked river'. The name is also assigned to the Cuyahoga River, which bisects the county.