格拉希厄特县 (Gratiot County, Michigan)是美国密歇根州部的一个县。面积1,480平方公里。根据美国2000年人口普查，共有人口42,285。县治伊萨卡。

成立于1855年。

Gratiot County (/ˈɡræʃɪt/) is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 42,476. The county seat is Ithaca, although its most populous city is Alma.

Gratiot County comprises the Alma, MI Micropolitan Statistical Area, which is also included in the Mount Pleasant-Alma, MI Combined Statistical Area.