List of US Post Office Stores in Lake Hopatcong, NJ Outlet Note Regular Brands US Post Office New Jersey Lake Hopatcong Rating 4.5 based on 76 votes Official Website https://www.usps.com/ Products Postal Service NameAddressPhone Name/Address/Phone US Post Office outlet - Lake Hopatcong 700 State Route 15 S (973) 663-3886 People Also Viewed