The latest quake struck a remote mountainous region in the south of the country on Saturday.
A provincial official told state media that 70 villages had suffered severe damage from the quake, which was followed by a series of aftershocks, ranging in magnitude from 4.1 to 5.2.
The strongest quake was centered about 50 miles southeast of the town of Minab, located in southern Hormozgan province, according to the U.S. Geological Survey.
Last month, the biggest earthquake to hit the country in 50 years killed dozens of people along in the southeast of the country, and in neighboring parts of Pakistan.
Also in April, a quake struck near Iran's Persian Gulf port of Bushehr, killing at least 30 people.