The 1929 Kopet Dag earthquake (also called the 1929 Koppeh Dagh earthquake) took place at 15:37 UTC on 1 May with a moment magnitude of 7.2 and a maximum Mercalli intensity of IX (Violent).

It occurred in the Kopet Dag area of Iran and caused up to 3,800 casualties along the Iran-Turkmenistan border.

Within the epicentral area, 3,250 people were killed.

Aftershocks occurred for more than four years after, including one in July 1929 that killed several more people, before finally subsiding in 1933.

Fifty-seven diverse locations reported damage, including casualties in Ashgabat, Turkmenistan.