Jarvis Island in the context of "United States Minor Outlying Islands"

American Samoa is an unincorporated and unorganized territory of the United States located in the Polynesia region of the south Pacific Ocean. Centered on 14°18′S 170°42′W / 14.3°S 170.7°W / -14.3; -170.7, it is 40 miles (64 km) southeast of the island country of Samoa, east of the International Date Line and the Wallis and Futuna Islands, west of the Cook Islands, north of Tonga, and some 310 miles (500 km) south of Tokelau. American Samoa is the southernmost territory of the United States, situated 2,200 miles (3,500 km) southwest of the U.S. state of Hawaii, and one of two U.S. territories south of the Equator, along with the uninhabited Jarvis Island.

American Samoa consists of the eastern part of the Samoan archipelago – the inhabited volcanic islands of Tutuila, Aunuʻu, Ofu, Olosega and Taʻū and the uninhabited Rose Atoll – as well as Swains Island, a remote coral atoll in the Tokelau volcanic island group. The total land area is 77 square miles (199 km), slightly larger than Washington, D.C.; including its territorial waters, the total area is 117,500 square miles (304,000 km), about the size of New Zealand. American Samoa has a tropical climate, with 90 percent of its land covered by rainforests. As of 2024, the population is approximately 47,400 and concentrated on Tutuila, which hosts the capital and largest settlement, Pago Pago. The vast majority of residents are indigenous ethnic Samoans, most of whom are fluent in the official languages, Samoan and English.

Palmyra Atoll (/pælˈmaɪrə/), also referred to as Palmyra Island, is one of the Northern Line Islands (southeast of Kingman Reef and north of Kiribati). It is located almost due south of the Hawaiian Islands, roughly one-third of the way between Hawaii and American Samoa. North America is about 3,300 miles (5,300 kilometers) northeast and New Zealand the same distance southwest, placing the atoll at the approximate center of the Pacific Ocean. The land area is 4.6 sq mi (12 km), with about 9 miles (14 km) of sea-facing coastline and reef. There is one boat anchorage, known as West Lagoon, accessible from the sea by a narrow artificial channel and an old airstrip; during WW2, it was turned into a Naval Air Station for several years and used for training and refueling. It was shelled by a submarine in December 1941, days after the Attack on Pearl Harbor, but was not the site of a major battle. Palmyra has, over time, had many of its islets merged together, so the actual amount of contiguous land depends on the tide and locations of sandbanks. For example, Strawn, Menge, and Cooper Islands are one contiguous island. Likewise, there are many shoals and coral heads on the atoll, which is ringed by a coral reef.

It is the second-northernmost of the Line Islands and one of three American islands in the archipelago, along with Jarvis Island and Kingman Reef. Palmyra Atoll is part of the Pacific Islands Heritage Marine National Monument, the world's largest marine protected area. The atoll comprises submerged sand flats along with dry land and reefs. It comprises three lagoons separated by coral reefs. The western reef terrace is one of the biggest shelf-reefs, with dimensions of 2 by 3 miles (3.2 by 4.8 km). Over 150 species of coral inhabit Palmyra Atoll, double the number recorded in Hawaii.

The Line Islands, Teraina Islands or Equatorial Islands (Gilbertese: Aono Raina) are a chain of 11 atolls (with partly or fully enclosed lagoons, except Vostok and Jarvis) and coral islands (with a surrounding reef) in the central Pacific Ocean, south of the Hawaiian Islands. Eight of the atolls are parts of Kiribati. The remaining three—Jarvis Island, Kingman Reef, and Palmyra Atoll—are territories of the United States grouped with the United States Minor Outlying Islands. The Line Islands, all of which were formed by volcanic activity, are one of the longest island chains in the world, stretching 2,350 km (1,460 mi) from northwest to southeast. One of them, Starbuck Island, is near the geographic center of the Pacific Ocean (4°58′S 158°45′W / 4.97°S 158.75°W / -4.97; -158.75). Another, Kiritimati, has the largest land area of any atoll in the world. Only Kiritimati, Tabuaeran, and Teraina have a permanent population. Besides the 11 confirmed atolls and islands, Filippo Reef is shown on some maps, but its existence is doubted.

The International Date Line passes through the Line Islands. The ones that are parts of Kiribati are in the world's farthest forward time zone, UTC+14:00. The time of day in these atolls is 24 hours ahead of the state of Hawaii in the United States, which uses UTC−10:00, and 26 hours ahead of some other islands in Oceania, such as Baker Island, which uses UTC−12:00.

The Samoa Time Zone or Samoa Standard Time (SST) observes standard time by subtracting eleven hours from Coordinated Universal Time (UTC−11:00). The clock time in this zone is based on the mean solar time of the 165th meridian west of the Greenwich Observatory.

The zone includes the U.S. territory of American Samoa, as well as the Midway Islands and the uninhabited islands of Jarvis, Palmyra, and Kingman Reef. It also includes the country of Niue.