Glasser is an area within the Northwood section of the Borough of Hopatcong, in Sussex County, in the U.S. state of New Jersey. While not officially a municipality, the area was granted its own post office in 1933 by the United States Postal Service that was later assigned ZIP Code 07837. Currently the area contains a small US Post Office, several residential apartments and bungalows, and a restaurant and bar overlooking Lake Hopatcong. Nearby residents get their mail delivered to PO boxes at the Glasser Post Office.