Keijō-fu 京城府
Former administrative district of Korea, Empire of Japan
Emblem of Keijo
English map of Keijō made by Imperial Japanese Government Railways in 1913
Population
• 1940	1,142,000
Today part of	South Korea

Keijō (Japanese: 京城), or Gyeongseong (Korean: 경성), was an administrative district of Korea under Japanese rule that corresponds to the present Seoul, the capital of South Korea.

When the Empire of Japan annexed the Korean Empire, it made Seoul the colonial capital. While under colonial rule (1910–1945), the city was called Keijō (京城; 경성; Gyeongseong; Kyŏngsŏng, literally meaning "capital city" in Hanja.).^[1] Keijō was an urban city (부; 府) that had 2 wards: Keijō itself and Ryusan-ku (龍山區, 용산구, りゅうさんく). Gyeongseong was part of Gyeonggi Province, instead of being an independent city or prefecture as in Joseon and present days. In 1914, several outer districts of the prefecture were annexed to neighboring Goyang County (now Goyang City, reducing the administrative size of the prefecture. In 1936, Gyeongseong expanded itself as it annexed Yeongdeungpo from Siehung County (Now Siehung City) and recombined some parts of former Gyeongseong districts (Sungin, Yeonghee, etc.) from Goyang County. The Government-General Building served as the seat of the colonial government of Colonial Korea but was torn down in 1995.

The central district of Gyeongseong was Honmachi, present-day Chungmu-ro.

• Names of Seoul