
Kinmen, also Quemoy, is a county of the Republic of China (Taiwan) located in the Taiwan Strait between the island of Taiwan and mainland China. The main island of Kinmen County is Kinmen Island. Kinmen is located ten kilometres (6.2 mi) east of Xiamen, a city located on the southeastern coast of China; the two territories are separated by a small bay. Kinmen is 187 kilometres (116 mi) west from the nearest part of the island of Taiwan.

The Battle of Kuningtou or Battle of Guningtou (Chinese: 古寧頭之役; pinyin: Gǔníngtóu zhī yì; Wade–Giles: Ku3-ning2-t’ou2 chih1 i4), also known as the Battle of Kinmen (金門戰役; Jīnmén Zhànyì), was a battle fought over Kinmen in the Taiwan Strait during the Chinese Civil War in 1949. The failure of the Communists to take the island left it in the hands of the Kuomintang (Nationalists) and crushed their chances of taking Taiwan to destroy the Nationalists completely in the war.

The Battle of Liaoluo Bay took place in 1633 off the coast of Fujian, China; involving the Dutch East India Company (VOC) and the Chinese Ming dynasty's navies. The battle was fought at the crescent-shaped Liaoluo Bay that forms the southern coast of the island of Kinmen. A Dutch fleet under Admiral Hans Putmans was attempting to control shipping in the Taiwan Strait, while the southern Fujian sea traffic and trade was protected by a fleet under Brigadier General Zheng Zhilong. This was the largest naval encounter between Chinese and European forces before the Opium Wars two hundred years later.

The Kinmen County Council is the elected county council of Kinmen County, Republic of China. The council composes of 19 councilors lastly elected through the 2018 Republic of China local election on 24 November 2018.

The Kinmen County Government is the local government of the Republic of China that governs Kinmen County.

The 1987 Lieyu massacre, also known as the March 7 Incident, Donggang Incident or Donggang Massacre, occurred on 7 March 1987 at Donggang Bay, Lieyu Island, Kinmen, Fujian, Republic of China. According to the diary of Superior-general Hau Pei-tsun, nineteen unarmed Vietnamese boat people were killed by the ROC military. There may have been more than nineteen deaths.
The Prince of Lu was part of the Southern Ming Dynasty, resisting the invading Manchu Qing dynasty forces. In 1651 he fled to Kinmen (Quemoy), in 1663 Kinmen was taken by the invaders.

The Taiwan Strait Tunnel Project is a proposed undersea tunnel to connect Pingtan in Mainland China to Hsinchu in Taiwan as part of the G3 Beijing–Taipei Expressway. First proposed in 1996, the project has since been subject to a number of academic discussions and feasibility studies, including by the China Railway Engineering Corporation. The route between Pingtan and Hsinchu was chosen because of its short distance and its relative geological stability. One expert from the Chinese Academy of Engineering suggested in 2005 that the Taiwan Strait Tunnel Project was one of five major undersea tunnel projects under consideration for the next twenty to thirty years.