Gwanghwamun Plaza, Public square in Jongno District, South Korea.

Gwanghwamun Plaza is a public square in Jongno District, Seoul, running along Sejongno in front of Gyeongbokgung. It is divided into sections, including a 130-meter stretch recreating the Gwanghwamun woldae and a 210-meter section marking the Yukjo-geori, the Street of Six Ministries. The bronze statue of Admiral Yi Sun-sin stands at the southern end, and the 6.2-meter, 20-ton bronze statue of King Sejong the Great sits 250 meters behind it.

The area was the Yukjo-geori, the Street of Six Ministries, during the Joseon period, then suffered neglect under Japanese colonial rule and damage in the Korean War. In the 20th century it became a 16-lane roadway. Construction of the square began on 23 April 2008 after the government declared it a demonstration-free zone, and it opened on 1 August 2009, cutting Sejongno from 16 to 10 lanes at a cost of ₩44.5 billion. A redesign closed it from late 2020 to August 2022, reducing Sejong-daero to 6 lanes and more than doubling the pedestrian area.

The plaza displays two major monuments honoring Korean achievements: Admiral Yi is celebrated for his naval innovations, and King Sejong for creating the Korean alphabet. Visitors can encounter these figures and understand why they hold such importance in Korea's story.

The plaza runs along Sejong-daero from Gwanghwamun to the Sejong-ro intersection and connects to Cheonggye Plaza. Gwanghwamun Station on Line 5 opens directly onto it, and the square is a smoke-free zone where fines apply. A 550-metre stretch of Sejong-ro beside the Sejong Center is reserved for pedestrians and cyclists.

The 12.23 Fountain beside Yi Sun-sin's statue takes its name from the 23 naval battles he fought with 12 warships during the 1592–1598 Japanese invasions. Its main jets rise 18 metres, with 300 smaller jets standing for those engagements. Some critics have argued the admiral actually commanded 13 ships.