塞勒姆县（Salem County, New Jersey）是美国新泽西州西南部的一个县。面积965平方公里。根据美国2000年人口普查，共有人口64,285。县治塞勒姆 (Salem)。

成立于1694年5月7日。县名来自希伯来语，是「和平」的意思。

Salem County is a county located in the U.S. state of New Jersey. Its western boundary is formed by the Delaware River and it has the eastern terminus of the Delaware Memorial Bridge, connecting to New Castle, Delaware. Its county seat is Salem. The county is part of the Delaware Valley area. Salem County's Census-estimated population was 64,180 in 2015, representing a 2.9% decrease from the 66,083 enumerated at the 2010 Census, in turn increasing by 1,798 (+2.8%) from the 64,285 counted in the 2000 Census, retaining its position as the state's least populous county. The most populous place was Pennsville Township, with 13,409 residents at the time of the 2010 Census. Lower Alloways Creek Township covers 72.46 square miles (187.7 km), the largest total area of any municipality.