罗斯康芒县（Roscommon County, Michigan）是位于美国密歇根州下半岛中北部的一个县。面积1,502平方公里。根据美国2000年人口普查，共有人口25,469人。县治罗斯康芒 (Roscommon)。

成立于1840年4月1日。县名来自爱尔兰同名的郡。

Roscommon County is a county located in the U.S. state of Michigan. As of the 2010 census, the population was 24,449. The county seat is Roscommon. The county was founded in 1840 and organized in 1875. Both the county and county seat are commonly referred to by locals as "Rosco".