杰佛逊·戴维斯县（Jefferson Davis County, Mississippi）是美国密西西比州中南部的一个县。面积1,060平方公里。根据美国2000年人口普查，共有人口13,962人。县治普兰提斯 (Prentiss)。

成立于1906年5月17日。县名纪念美利坚邦联总统杰佛逊·戴维斯。

Jefferson Davis County is a county located in the U.S. state of Mississippi. As of the 2010 census, the population was 12,487. Its county seat is Prentiss. The county is named in honor of Mississippi Senator and Confederate President Jefferson Davis. The county was carved out of Covington and Lawrence counties in March 1906. Governor James K. Vardaman signed the bill creating the county on May 9, 1906.