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Official Languages: English

English is the main language used in daily life, tourism, and official services.

Mobile Network: Mobile coverage is generally good in populated parts of St. Thomas, St. John, and St. Croix, but service can weaken in hilly areas, national park zones, offshore spots, and during severe weather or power outages.

Roaming/SIM/eSIM: U.S. travelers commonly use their normal domestic roaming or plan coverage because the territory is part of the United States, but it is still wise to confirm carrier terms before arrival. For non-U.S. visitors, roaming can be expensive, so a local SIM or eSIM is often better value if your phone is unlocked. eSIM can be the easiest option for short stays if your device supports it, while a local SIM may be cheaper for heavier data use or longer trips.

Cards are widely accepted at hotels, restaurants, supermarkets, and many tour operators. Small shops, taxis, beach bars, and some independent vendors commonly prefer cash, so carrying small U.S. dollar notes is useful.

Tipping is common and follows U.S. practice. In restaurants, around 15 to 20 percent is typical if service is not already included. Check the bill because some venues, especially for larger groups or tourist settings, may add a service charge. Taxi drivers commonly receive a small tip, and hotel staff such as porters and housekeeping are often tipped as well.

Plug Type: Type A and Type B

Voltage: 110 V, 60 Hz

Adapter: Travelers from the mainland United States typically do not need an adapter. Visitors from countries using other plug types or 220 to 240 V systems commonly need a plug adapter, and some devices may also need voltage compatibility.