Great Korean Empire
대한제궄 (kr)
大韓帝國 (zh)
大韓国帝国 (ja)
Великая империя Корея (ru)
Große Reich der Korea (de)

OTL equivalent: Korean peninsula (except Incheon), Dalian, Wenhai, Yantai, Liaoning, portions of Jilin
Flag of South Korea.svg Imperial Seal of Japan.svg
Coat of arms
부국, 강병
Bugug, gangbyeong
("Enrich the state, strengthen the military") (Korean)

Nos richesse et nos puissance
("Our wealth and our power")(French)
"Patriotic Song"
Korea (orthographic projection).svg
(and largest city)
Official languages Korean
Ethnic groups  Koreans (60%), Manchurians (34.9%), Russians (0.3%), Other (4.8%)
Demonym Korean
Religion None (freedom of religion)
Government Constitutional monarchy
 -  Emperor Gojong
 -  Premier Heungseon Daewongun
Legislature National Diet
 -  Coup of 1388 May 20, 1388 
 -  Coronation of Taejo July 17, 1392 
 -  Creation of Hangul October 9, 1446 
 -  Empire's promulgation 1861 
 -  Shift to constitutional monarchy 1867 
 -  1876 estimate 30,636,012 
GDP (PPP) 1879 estimate
 -  Total $48.507 billion 
 -  Per capita $1,583 
Currency Korean Yang (양, 陽)
Time zone KST (UTC+9)
Date formats yyyy mm dd
yyyy/mm/dd (CE)

The Great Korean Empire (Korean: 대한 제국, tr. Daehan Jeguk) is a constitutional monarchy situated in East Asia, bordering China to the West, Japan to the East, and Russia to the North. It has more than 30 million people living in a 239,750 km² (148,974 sq mi) expanse of land that includes the Korean peninsula, the Liaodong peninsula, and the northernmost tip of the Shandong peninsula.

The preceding Joseon dynasty was founded by King Taejo in late 14th century. The early parts of the dynasty was marked by high progress and development based in the Confucian model, with trade with China and other nations flourishing. However, the later part of the dynasty was influenced by a harsh policy of isolationism after being threatened with invasions from Japan and the Qing dynasty. After being threatened by Japan's subjugation as a de facto extension of British will and public pressure from the reformist yangban class, Emperor Gojong initiated a series of reforms that has led Korea on the path to modernisation, later proclaiming the establishment of the Empire.

It is internationally recognised as a major regional power, and has recently become a westernised state that has adopted modern European institutions and systems. It is one of the most developed states in the Orient, along with its neighbour Japan. It is a founding member of the Eurasian Organisation of Mutual Assistance and Economic Development.