| 1st Marine Infantry Division | |
|---|---|
&sq=Qlik&lang=&file=File:ROKMC_Sea_Dragon_Unit_Insignia.png) 1st Marine Infantry Division insignia | |
| Active | 15 January 1955 – present (69 years, 8 months) |
| Country |  South Korea |
| Branch |  Republic of Korea Marine Corps |
| Type | Infantry Division |
| Size | Division |
| Part of | ROK Marine Corps Headquarters |
| Garrison/HQ | Pohang, North Gyeongsang Province |
| Nickname(s) | Haeryong (Sea Dragon) |
The 1st Marine Infantry Division (Korean: 제1해병사단; Hanja: 第1海兵師團), also known as Sea Dragon Division (Korean: 해룡부대; Hanja: 海龍部隊), is an infantry division of the Republic of Korea Marine Corps.