how long was the korean war

The Korean War lasted a little over three years, from June 25, 1950, to July 27, 1953.

Quick Scoop: How long was the Korean War?

• Start of the war: North Korean forces invaded South Korea on June 25, 1950.

• End of active fighting: The armistice was signed on July 27, 1953, stopping large‑scale combat.

• Total duration: About 3 years and 1 month.

• Important detail: No formal peace treaty was signed, so the war is often said to be “technically” not over, only paused by an armistice.

Why the dates matter

• The dates 1950–19531950–19531950–1953 mark the period of full-scale, organized military conflict between North Korea (backed mainly by China) and South Korea (backed by a UN coalition led by the United States).

• After July 1953, the Korean Peninsula remained divided near the 38th parallel, with a Demilitarized Zone (DMZ) separating North and South Korea, and that tense border still exists today.

A quick mental picture

If you imagine World War II ending in 1945 and the Vietnam War expanding in the mid‑1960s, the Korean War sits in between as a three‑year conflict from mid‑1950 to mid‑1953, sometimes called the “Forgotten War” because it gets less public attention than those two but was extremely deadly and consequential.