| Wentworth by the Sea | |
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| General information | |
| Location | New Castle, New Hampshire |
| Address | 599 Wentworth Rd |
| Coordinates | 43°3′36″N 70°43′34″W / 43.06000°N 70.72611°W |
| Opening | 1874 |
| Owner | Ocean Properties Hotels and Resorts |
| Management | Opal Collection Hotels & Resorts |
| Other information | |
| Number of rooms | 161 |
The Wentworth by the Sea is a historic grand resort hotel in New Castle, New Hampshire, United States. It is one of a handful of the state's surviving Gilded Age grand hotels, and the last located on the seacoast. The Wentworth by the Sea is a member of Historic Hotels of America, the official program of the National Trust for Historic Preservation.