| Diamond Cay | |
| Location: | Caribbean Sea |
| Map: | British Virgin Islands#Caribbean |
| Coordinates: | 18.4486°N -64.7244°W |
| Archipelago: | Virgin Islands |
| Country: | United Kingdom |
| Country Admin Divisions Title: | British Overseas Territory |
| Country Admin Divisions: | British Virgin Islands |
| Timezone1: | AST |
| Utc Offset1: | -4 |
| Iso Code: | VG |
Diamond Cay is a tiny islet located just off Jost Van Dyke in the British Virgin Islands in the Caribbean. At low tide, it is connected by a sandbar to Jost Van Dyke. It was declared a national park in 1991.[1] The Diamond Cay National Park provides habitat for pelicans, terns and boobies to nest.[2] [3]