Yes, Korea is very safe compare to other countries. Korea remains one of the safest nations in the world as measured by its low crime rate. However, as in any other countries, you should always exercise prudent personal safety. Guns, for example, are illegal unlike here in the U.S. so fatality from a gunshot wound is non-existent. Korea is a homogeneous country where 99% of the populace is composed of Koreans. For that reason, there's a uniform code of conduct based on common cultural ties, which includes showing respect to elders, behaving properly in public, and working and studying hard.