格拉纳达县（Grenada County, Mississippi）是美国密西西比州中北部的一个县。面积1,164平方公里。根据美国2000年人口普查，共有人口23,263人。县治格拉纳达 (Grenada)。

成立于1870年5月9日，县名来自西班牙的格拉纳达省。

Grenada County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 21,906. Its county seat is Grenada. The county is named for the province of Granada in southern Spain. Its western border is formed by the Yazoo River and it fronts on the Mississippi Delta. Cotton cultivation was important to its economy well into the 20th century.