Hassel Island, U.S. Virgin Islands in the context of Water Island, United States Virgin Islands

Charlotte Amalie (/ˈʃɑːrlət əˈmɑːli(ə)/ SHAR-lət ə-MAH-lee(-ə); Danish: [ʃɑˈlʌtʰə ɑˈmɑːljə]), located in Saint Thomas, is the capital and largest town of the U.S. Virgin Islands. It is located on the island's southern shore at the head of Charlotte Amalie Harbor. The town is known for its historic sites, Danish colonial architecture, harbor, and shopping. In 2020, it had a population of 8,194, making it the most densely populated town in the U.S. Virgin Islands.

It has a deep-water harbor that was once a haven for pirates (including Blackbeard) and is now one of the busiest ports of call for cruise ships in the Caribbean. About 1.5 million-plus cruise ship passengers land there annually, and hundreds of ferries and yachts pass by each week. Protected by Hassel Island, the harbor has docking and fueling facilities, machine shops, and shipyards and was a U.S. submarine base until 1966.

Water Island (Danish: Vand ø) is a minor island in the United States Virgin Islands, an American territory located in the Caribbean Sea. The rest of the U.S. Virgin Islands were acquired by the Americans in 1917 from Denmark; however, Water Island was excluded, thus the Danish East Asiatic Company, and by proxy the Danish kingdom, continued to own Water Island until several decades later. Water Island was bought by the U.S. Government in 1944, and in 1996 it was transferred to the U.S. Virgin Islands. The island is of volcanic origin and lies to the south of Saint Thomas in the Charlotte Amalie harbor. A ferry service runs regularly from Crown Bay, Saint Thomas, to Phillips Landing, Water Island; the ferry ride is about 10 minutes.

At 491.5 acres (1.989 km) in size, it is administratively part (with Hassel Island) of the subdistrict of Water Island, in Saint Thomas District. Water Island is a residential island, with a population of 182 (2010 census) and no significant commercial establishments. A number of homes on Water Island are available to accommodate visitors. The main attractions are beaches, including Honeymoon Beach, plantation ruins, Fort Segarra, an underground fort partially constructed by the U.S. during World War II, and scuba diving site Supermarket Reef in Limestone Bay.