| Official Name: | Lake Hopatcong, New Jersey |
| Settlement Type: | Census-designated place |
| Pushpin Map: | USA New Jersey Morris County#USA New Jersey#USA |
| Pushpin Label: | Lake Hopatcong |
| Pushpin Map Caption: | Location in Morris County##Location in New Jersey##Location in the United States |
| Pushpin Relief: | yes |
| Coordinates: | 40.9608°N -74.6128°W |
| Subdivision Type: | Country |
| Subdivision Name: |  United States |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name2: | Morris |
| Subdivision Type3: | Township |
| Subdivision Name3: | Jefferson |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Sq Mi: | 9.39 |
| Area Land Sq Mi: | 7.39 |
| Area Water Sq Mi: | 2.00 |
| Area Total Km2: | 24.32 |
| Area Land Km2: | 19.13 |
| Area Water Km2: | 5.19 |
| Population As Of: | 2020 |
| Population Footnotes: | [2] |
| Population Total: | 10232 |
| Population Density Km2: | 534.90 |
| Population Density Sq Mi: | 1385.32 |
| Timezone: | Eastern (EST) |
| Utc Offset: | −05:00 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | −04:00 |
| Elevation Ft: | 930 |
| Postal Code Type: | ZIP Codes |
| Postal Code: | 07849 (Lake Hopatcong) 07885 (Wharton) |
| Area Code: | 973/862 |
| Blank Name: | FIPS code |
| Blank Info: | [3] |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2806109 |
Lake Hopatcong is a census-designated place (CDP)[4] in Jefferson Township, Morris County, New Jersey, United States. It includes communities on the northeast side of Lake Hopatcong, the largest freshwater body in the state. As of the 2020 United States census, the population was 10,232.[2]
The Lake Hopatcong CDP occupies the southwest end of Jefferson Township in western Morris County. It is bordered to the west by the borough of Hopatcong and to the north by Sparta Township, both in Sussex County. It is partially bordered to the south by the borough of Mount Arlington and slightly by the Lower Berkshire Valley CDP.
Lake Hopatcong, the water body, occupies part of the western boundary of the CDP, while the northernmost arm of the lake is entirely within the CDP. Lakefront communities in the CDP include Espanong, Prospect Point, Raccoon Island, and Woodport, and inland communities include Hurdtown, Tierneys Corner, and Berkshire Valley. Lake Shawnee is in the northeast part of the CDP.New Jersey Route 15 passes through the eastern side of the CDP, leading south 4miles to Interstate 80 in Wharton and north 6miles to Sparta.
According to the U.S. Census Bureau, the Lake Hopatcong CDP has a total area of 9.39sqmi, of which 7.39sqmi are land and 2sqmi, or 21.34%, are water.[1] The lake, with an outlet 2miles to the southwest into the Musconetcong River, is part of the Delaware River watershed.
The community was first listed as a CDP prior to the 2020 census.
People who were born in, residents of, or otherwise closely associated with Lake Hopatcong include: