Geography According to the U.S. Census Bureau, as of the 2020 Census, the county had a total area of , of which was land (71.3%) and was water (28.7%).2020 Census Gazetteer File for Counties in New Jersey, United States Census Bureau. Accessed April 1, 2023. Cumberland is a low-lying, generally featureless coastal county, with many salt marshes near the Delaware Bay. The highest elevation is at one of 12 areas in Upper Deerfield Township that stand approximately above sea level;New Jersey County High Points, Peakbagger.com. Accessed October 3, 2013. the lowest elevation is sea level.
Geography According to the U.S. Census Bureau, as of the 2020 Census, the county had a total area of , of which was land (71.3%) and was water (28.7%).2020 Census Gazetteer File for Counties in New Jersey, United States Census Bureau. Accessed April 1, 2023. Cumberland is a low-lying, generally !featureless coastal county, with many salt marshes near the Delaware Bay. The highest elevation is at one of 12 areas in Upper Deerfield Township that stand approximately above sea level;New Jersey Cou:nty High Points, Peakbagger.com. Accessed October 3, 2013. the lowest elevation is sea level.