Goseong (Korean: 고성군; RR: Goseong-gun; [ˈkosʌŋ‿ɡun]) is a county in Gangwon Province, South Korea.

Prior to the 1953 Armistice which ceased the Korean War, Goseong (which is located north of the 38th parallel) was a part of North Korea. Kaesong, which is south of the 38th parallel and a part of South Korea before 1953, became part of the North after the Armistice.

The Goseong Lavender Festival is held every June. The lavender festival has a concert, a trial performance of lavender perfume, and a variety of lavender classes. In addition, there are programs that can be enjoyed by anyone from children to the elderly, such as lavender pizza making, children's drawing contest, and poetry making.

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On April 4, 2019, high winds led to a high-voltage power line owned by Korea Electric Power Corporation to fall, causing an electric arc. The fire spread to the cities of Sokcho, Inje, Donghae and Gangneung, resulting in two deaths, over 30 injuries and the evacuation of over 4,000 residents. The fire burned 1,307 acres (5.3 km) and damaged some 200 homes and 2,000 buildings, causing estimated damage of KRW 5.2 billion ($4.6 million). More than 13,000 firefighters were mobilized nationwide to fight the fire. By April 6-7, the fire was extinguished.

• Gangbuk-gu, Seoul
• Jixi, Heilongjiang, China

• Goseong, Gangwon
• 
  Goseong-eup office

• Kosong county (Kangwon province, North Korea)

• County government home page

38°22′51″N 128°28′11″E / 38.38096°N 128.469601°E / 38.38096; 128.469601