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5th Infantry Division
5th Infantry Division insignia
Active	29 April 1948 - present
Country	South Korea
Branch	Republic of Korea Army
Type	Division
Role	Infantry
Part of	V Corps (Republic of Korea)
Garrison/HQ	Yeoncheon, Gyeonggi Province
Nickname(s)	"The Key"
Engagements	Korean War Battle of Bloody Ridge
Commanders
Notable commanders	Park Chung-hee Chae Myung-shin

The 5th Infantry Division (Korean: 제5보병사단; Hanja: 第五步兵師團), also known as The Key Division (열쇠부대) is a unit of the Republic of Korea Army. It is a frontline division that protects the GOP and GP of Yeoncheon County, Gyeonggi Province.

The division was created on 29 April 1948, participated the Korean War and it is one of the first units of the South Korean Army.

• Headquarters:^[1]
  • Headquarters Company
  • TOW Company
  • Recruiting Company
  • Air Defense Company
  • Engineer Battalion 'BULL'
  • Maintenance Battalion 'SEA EAGLE'
  • Supply & Transport Battalion
  • Reconnaissance Battalion 'PEGASUS'
  • Armored Battalion
  • Signal Battalion
  • Military Police Battalion
  • Medical Battalion
  • Chemical Battalion
• 27th Infantry Brigade 'LEOPARD'
• 35th Infantry Brigade 'LION'
• 36th Infantry Brigade 'EAGLE'
• Artillery Brigade 'WHITE BEAR'
  • 195th Field Artillery Battalion
  • 196th Field Artillery Battalion 'YELLOW DRAGON'
  • 205th Field Artillery Battalion
  • 988th Field Artillery Battalion

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