Provinces of Korea

Korea has had administrative districts that can be considered provinces since the 7th century. These divisions were initially called ju (Korean: 주; Hanja: 州) in Unified Silla and Later Baekje, and there were nine in total. After Goryeo conquered these states in the 10th century, twelve divisions called mok (목; 牧) were established, although they were reorganized into ten do (도; 道) in the 11th century.

After Joseon's conquest of Goryeo, it reorganized the peninsula into eight do in 1413. The provincial boundaries closely reflected major regional and dialect boundaries, and are still often referred to in Korean today simply as the Eight Provinces. In 1895, as part of the Gabo Reform, the country was redivided into 23 districts (Bu; 부; 府), which were replaced a year later by thirteen new provinces. The thirteen provinces of 1896 included three of the original eight provinces, with the five remaining original provinces divided into north and south halves (Bukdo (북도; 北道) and Namdo (남도; 南道) respectively). The thirteen provinces remained unchanged throughout the Japanese colonial period.

With the liberation of Korea in 1945, the Korean peninsula was divided into North Korea and South Korea, with the dividing line established along the 38th parallel. As a result, three provinces—Hwanghae, Gyeonggi, and Gangwon (Kangwŏn)—were divided into North Korea and South Korea today. The special cities of Seoul (South Korea) and P'yŏngyang (North Korea) were formed in 1946. Between 1946 and 1954, five new provinces were created: Jeju in South Korea, and North and South Hwanghae, Chagang, and Ryanggang in North Korea. Since 1954, provincial boundaries in both the North and South have remained unchanged but new cities and special administrative regions have been created.