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|— Municipal City —|
|• Revised Romanization||Yeosu-si|
|Administrative divisions||1 eup, 6 myeon, 20 dong|
|• Total||503.33 km2 (194.34 sq mi)|
|• Density||587.17/km2 (1,520.8/sq mi)|
The city of Yeosu consists of the Yeosu peninsula as well as 317 islands (49 inhabited, 268 uninhabited). Being midway along southern coast of South Korea, it is flanked by Namhae County in South Gyeongsang Province to the east with natural waterway, and the Bay of Suncheon to the west and northwest, the city of Suncheon sprawling along its banks. The city has three different City Halls. On 1 April 1998, the cities of Yeosu and Yeocheon, along with Yeocheon County merged to form the unified city of Yeosu.
Thanks to the sea wind and warm current, Yeosu has cool summers and mild winters. Its ocean climate also brings Yeosu relatively longer springs and autumns than other regions. Yeosu is a city of history and loyalty where the headquarters of South Jeolla Province Navy Base was located, and the Great Admiral Yi Sun Shin invented the Geobukseon (turtle ship) to save the country while serving as the Navy Commander.
Due to its appeal as an international ocean resort and tourist city, as well as its close proximity to the Yeocheon Industrial Complex, Yeosu has seen much development during the past several decades. In the 142nd General Assembly of BIE, held in Paris on 26 November 2007, the global community selected Yeosu as the host city for the 2012 World Expo. This Expo is Korea's second, following Daejeon's 1993 Fair.
Yeosu has a humid subtropical climate (Köppen climate classification Cwa) with very warm summers and cold winters. Rainfall is much heavier in the summer, with the months from June to August recording over 200 millimetres (7.9 in) of rainfall each.
|Climate data for Yeosu (1981–2010)|
|Average high °C (°F)||6.2
|Daily mean °C (°F)||2.4
|Average low °C (°F)||−0.8
|Precipitation mm (inches)||25.1
|Avg. precipitation days (≥ 0.1 mm)||5.2||6.4||8.5||9.1||9.7||10.8||14.4||11.8||9.0||4.9||6.0||4.4||100.2|
|Mean monthly sunshine hours||193.3||186.5||203.4||215.5||220.1||173.6||158.2||196.4||178.6||216.6||190.7||198.3||2,331.3|
|Source: Korea Meteorological Administration |
Wonchon-hyeon/Dolsan-hyeon was the name given to Yeosu in the 16th year of King Seong (538 A.D.) who was the king of Baekje Kingdom. The name changed to Haeub-hyeon/Yeosan-hyeon in 757 and to Yeosu-hyeon/Dolsan-hyeon in 940. Beginning in 1479, the Joseon Dynasty's Naval Headquarters for eastern sector of Cholla Province was located there. As such, it was the first base where Admiral Yi Sun-sin's fleet was based at during the Imjin War.
In 1897, Yeosu was renamed Yeosu-myeon and included in the new county of Yeosu-gun. In 1914, Yeosu-gun merged with Dolsan-gun, further increasing its territory. Naturally, Yeosu-myeon grew in its territory. In 1931, Yeosu-myeon became Yeosu-eup. In 1949, Yeosu became a city. In 1998, Yeosu city merged with Yeochon city and Yeochon-gun, creating the unified city of Yeosu.
Yeosu Rebellion 
In October 1948, the town of Yeosu was taken by South Korean soldiers who refused to take part in the suppression of the ongoing Jeju uprising.
In the harbour there is a full-size model of one of Admiral Yi's turtle ships, timber shelled vessels which were used to defeat the Japanese navy. There is a beach with volcanic 'black' sand near Yeosu that is popular with Korean tourists. The name of the beach is Manseongri Beach. There are public showers and restrooms as well as on-duty lifeguards. Many restaurants located along the beach have beach-side tables and serve various seafood dishes. It is also possible to take ferries to many local islands for an authentic taste of rural Korea.
Sister cities 
- Cebu, Philippines
- Hangzhou, China
- Karatsu, Japan
- Newport Beach, United States
- Sikeston, United States
- Vanino, Russia
- Weihai, China
- Port of Spain, Trinidad and Tobago
- Santiago de Querétaro, México
- Lishui, Zhejiang, China
See also 
- "평년값자료(1981–2010) 여수(168)". Korea Meteorological Administration. Retrieved 2 May 2011.