Lacey Township is a township in Ocean County, in the U.S. state of New Jersey and is considered part of the Jersey Shore and South Jersey regions, as well as of the New York metropolitan area. As of the 2020 United States census, the township's population was 28,655, an increase of 1,011 (+3.7%) from the 2010 census count of 27,644, which in turn reflected an increase of 2,298 (+9.1%) from the 25,346 counted in the 2000 census. The 2010 population was the highest recorded in any decennial census. It was named for Continental Army General John Lacey.

South Jersey comprises the southern portion of the U.S. state of New Jersey. It is located between Pennsylvania and the lower Delaware River to its west, the Atlantic Ocean to its east, Delaware to its south, and Central Jersey or North Jersey to its north, depending on the definition of North Jersey.