Shongum is an unincorporated community located within Randolph Township in Morris County, in the U.S. state of New Jersey.

They had six campsites and a rock shelter in the Shongum area and used the banks of the Den Brook as a pathway to a branch of the Minisink trail in Denville.

William Penn, one of the Proprietors, received 2500 acres encompassing the Shongum area as a dividend in 1715.

The lake is not a natural one, and was created in 1758 by Robert Young, who had purchased the land from William Penn to operate an iron forge.

In 1974 it was acquired by the Shongum Lake Property Owners Association and is used once again for club functions and private parties.