Gokseong (곡성군, 谷城郡, valley.castle.county) is a county in Jeollanam-do. The population as of 2004 was 34,550, including:
- 34,396 Koreans and
- 154 non-Koreans.
Gokseong shares a border with Namwon, Jeollabuk-do.
Gokseong was made into a county in 1899, and in 1914 it absorbed the other counties of Okgwa (옥과군, 玉果郡) and Godalmyeon (고달면, 古達面) in Gurye county.
The county is located in a mountainous region and there are no large flat fields. 12.2% of the county is rice fields, 5.5% is farmland, and 72.2% is woodland. This keeps the amount of agriculture in the county lower than in other locations.
As of 2002 there were 7,618 households involved in farming with a total of 19,072 people.
As apples can be grown in forested land there is quite a bit of apple cultivation, and the county receives over 2,000 hours of sunlight per year on average which aids this.
- Primary industry: 60.4%
- Secondary industry: 6.7%
- Tertiary industry: 32.9%