Seosan

Seosan
서산시
Korean transcription(s)
  Hangul서산시
  Hanja瑞山
  Revised RomanizationSeosan-si
  McCune–ReischauerSŏsan-si
Left: Yonghyeon-ri Rock-carved triad buddha, Haemi Martyrs Shrine, Haemee Eupseong Fortress, Bowonsal Temple Ruin, Right: Samgilbo harbour, Ganworam Hermitage, Hwangguem mountain and cave, Gaesimsa Temple (all item from above to bottom)
Location in South Korea
Coordinates: 36°46′54″N 126°27′08″E / 36.78167°N 126.45222°E / 36.78167; 126.45222
Country South Korea
RegionChungcheong
Administrative divisions1 eup, 9 myeon, 5 dong
Government
  MayorLee Wan-seop (이완섭)
Area
  Total
742.28 km2 (286.60 sq mi)
Population
 (September 2024)
  Total
175,144
  Dialect
Chungcheong
Time zoneUTC+9 (Korea Standard Time)
City BirdBaikal Teal and Black-Winged Stilt
City FlowerChrysanthemum
City TreePine tree
Websitewww.seosan.go.kr

Seosan (Korean: 서산; Korean pronunciation: [sʰʌ.san]) is a city in South Chungcheong Province, South Korea, with a population of roughly 175,000 according to the 2017 census. Located at the northwestern end of South Chungcheong Province, it is bounded by Dangjin, Naepo New Town, Yesan-gun and Hongseong-gun on the east, Taean-gun and the Yellow Sea on the west, 125 km (78 mi) south of Seoul, 159 km (99 mi) northwest of Daejeon and 34 km (21 mi) northwest of Naepo New Town. Seosan is the hub of transportation on the west coast where the Seohaean Expressway, Daejeon-Dangjin Expressway, and National Highways No. 29, 32, 38, and 45 intersect.