The earliest evidence of human occupation in the Pohang area is from the
Mumun Pottery Period (1500–300 BC). Archaeologists have unearthed small villages and megalithic burials (
dolmen) from this period. Still a small fishing village at the dawn of the 20th century, the earliest steps toward developing Pohang into a place of greater significance were taken in 1930 with the construction of a modern harbour. Pohang grew rapidly afterward, attaining the designation of town (
eup) in 1931 and then earning the status of city (
si) in 1949. Pohang's road arteries and shipping port made it a place of strategic significance during the
Korean War. An unopposed landing of UN forces at Pohang on July 18, 1950 was the first large-scale amphibious operation since World War II, and the region around Pohang saw
fierce clashes between South Korea's
3rd Infantry Division and North Korea's
5th Infantry Division during August–September 1950. By the 1960s, Pohang was a small coastal city with a population of 50,000. The next major development in Pohang's growth came in 1968 with the inauguration of the steel maker
POSCO, and the local plant's commencement of production in 1972. The introduction of
heavy industry to the city brought the local economy to a blend of iron, steel, shipbuilding and fisheries through the end of the 20th century. In response, the Pohang of today presents itself as having an eye to the future, striving to become a diversified city of
environmentalism and advanced learning, as well as a centre of arts and culture. During the
Silla Dynasty the area was made up of four
hyeon, Toehwa-hyeon (), Jidap-hyeon (), Geunoji-hyeon (), Haea-hyeon (). Then during the
Goryeo Dynasty these four were renamed to Heunghae-
gun (흥해군/), Janggi-hyeon (), Yeongil-hyeon (), Cheongha-hyeon () respectively. On 4 August 1896, the three remaining
hyeon, which at that time were Janggi, Yeonil (; originally Yeongil) and Cheongha were reassigned as counties or
gun as part of the change to the 13-province division of the
Korean Empire. On 1 March 1914, the four counties were unified as one Yeongil-gun (), which was subdivided into 18
myeons. On 1 April 1931, Pohang-myeon () was designated as an
eup, thus giving Yeongil-gun 1 eup and 17 myeon. On 1 April 1934, Jukbuk-myeon () and Juknam-myeon () were united to make Jukjang-myeon (), while Janggi-myeon () and Bongsan-myeon () united to make Jihaeng-myeon (), so that there were 1 eup and 15 myeon. On 1 October 1938, Hyeongsan-myeon () was incorporated into Pohang-eup, leaving Yeongil-gun with 1 eup and 14 myeon. On 1 October 1942 Changju-myeon () was renamed and reclassified as Guryongpo-eup (구룡포읍/九龍浦邑), leaving 2 eup and 13 myeon. On 15 August 1949, Pohang-eup was designated as Pohang-
si (), leaving Yeongil with 1 si, 1 eup, 13 myeon and 1 local office. On 8 July 1956, Heunghae-myeon () and Gokgang-myeon () are incorporated into Uichang-myeon () leaving 1 si, 1 eup and 12 myeon. On 29 October 1957, Daljeon-myeon () is abolished and incorporated into Heunghae-myeon and Yeonil-myeon () leaving 1 si, 1 eup and 11 myeons. On 1 March 1967, the Gibuk Local Office () of Gigye-myeon (기계면/) is established. On 1 July 1973, Uichang-myeon is designated as Uichang-eup () leaving 1 si, 2 eup, 10 myeon and 3 local offices. On 1 December 1980, Yeonil-myeon and Ocheon-myeon () are both designated as eup leaving 1 si, 4 eup, 8 myeon and 3 local offices. On 1 September 1982, Haedo-dong () and Sangdae-dong () are separated into Haedo 1 and 2-dong and Sangdae 1 and 2-dong respectively. On 1 April 1986, Daebo Local Office () and Gibuk Local Office are designated as myeon leaving 1 si, 4 eup, 10 myeon and 1 local office. On 1 January 1995, a united Pohang absorbs all of Yeongil-gun, composed of 1 si, 2 gu, 4 eup, 10 myeon, 25 dong and 1 local office. On 1 September 1998, the unification of Small-dong left Pohang with 1 si, 2 gu, 4 eup, 10 myeon, 19 dong and 1 local office. On 1 January 2009, the unification of Small-dong left Pohang with 1 si, 2 gu, 4 eup, 10 myeon, 15 dong and 1 local office. ==Geography and climate==