Provinces of South Korea in the context of "North Gyeongsang Province"

The following is a list of major islands of South Korea, the Republic of Korea, arranged by body of water and then by province.

South Korea is mostly surrounded by water and has 2,413 kilometres (1,499 mi) of coast line along three seas; to the west is the Yellow Sea (called Sohae Korean: 서해; Hanja: 西海; in South Korea, literally means west sea), to the south is the East China Sea, and to the east is the East Sea (Sea of Japan) (called Donghae Korean: 동해; Hanja: 東海; in South Korea, literally means east sea). Geographically, South Korea's landmass is approximately 100,032 square kilometres (38,623 sq mi).

Jeju Province (Jeju and Korean: 제주도; Hanja: 濟州道; RR: Jejudo), officially Jeju Special Self-Governing Province (Jeju: 제주특벨ᄌᆞ치도; Korean: 제주특별자치도; Hanja: 濟州特別自治道; RR: Jeju Teukbyeoljachi-do), is the southernmost province of South Korea, consisting of eight inhabited and 55 uninhabited islands, including Marado, Udo, the Chuja Archipelago, and the country's largest island, Jeju Island. The province is located in the Korea Strait, with the Korean Peninsula to the northwest, Japan to the east, and China to the west. The province has two cities: the capital Jeju City, on the northern half of the island, and Seogwipo, on the southern half of the island. The island is home to the shield volcano Hallasan, the highest point in South Korea. Jeju and Korean are the official languages of the province, and the vast majority of residents are bilingual.

Jeju Island was first settled by humans 8,000 to 10,000 years ago and the Tamna Kingdom is the earliest known civilization on the island. Beginning in the 5th century AD, the kingdom would become a tributary state of various Korean Kingdoms and briefly invaded by the Mongol Empire, before being annexed into the Goryeo in 1105 and later Joseon in 1392. Joseon ruled the island brutally and multiple uprisings occurred. Jeju Island, with the rest of mainland Korea, was annexed by the Empire of Japan in 1910. Following Japan's surrender in World War II in 1945, the islands became part of South Jeolla Province in the United States Army Military Government in Korea, before becoming a separate province on August 1, 1946. On July 1, 2006, the islands were designated a Special Self-Governing Province; it is now one of three special self-governing provinces, the others being Gangwon State and Jeonbuk State.

The Jeju people or Jejuans are a subgroup of Koreans native to the Jeju island, which is geographically located in the East China Sea. Administratively, they live in Jeju Province, excluding Chuja Islands, an autonomous self-governing province of South Korea.

Jejuans speak the Jeju language, which is considered to be one of the two branches of the Koreanic language family, as it has no mutual intelligibility with Standard Korean or any other Korean dialects in the Korean Peninsula. Jejuans also have unique cultural traditions that are distinct from mainland Koreans.

South Korea is made up of 17 first-tier administrative divisions: 6 metropolitan cities (gwangyeoksi 광역시/廣域市), 1 special city (teukbyeolsi 특별시/特別市), 1 special self-governing city (teukbyeol-jachisi 특별자치시/特別自治市), and 9 provinces (do 도/道), including three special self-governing provinces (teukbyeol jachido 특별자치도/特別自治道) and six claimed by the ROK government. These are further subdivided into a variety of smaller entities, including cities (si 시/市), counties (gun 군/郡), districts (gu 구/區), towns (eup 읍/邑), townships (myeon 면/面), neighborhoods (dong 동/洞) and villages (ri 리/里).

During most of the Joseon dynasty, Korea was divided into eight provinces (do; 도; 道). The eight provinces' boundaries remained unchanged for about 480 years from 1413 to 1895, and formed a geographic paradigm that is still reflected today in the Korean Peninsula's administrative divisions, dialects, and regional distinctions. The names of all eight provinces are still preserved today, in one form or another. These eight historical provinces form both North and South Korea, and are not to be confused with the modern provinces that make up North Korea or South Korea.