The declaration came after no new case of MERS infection was reported for more than three weeks.
The MERS scare had dealt a serious blow to the country's tourism industry since the government confirmed the first outbreak of the viral respiratory disease on May 20.
Foreign tourist arrivals, mostly Chinese, in the nation plunged 41 percent in June from a year earlier in the wake of the MRES outbreak, according to data compiled by the state-run Korea Tourism Organization (KTO). It marked the first on-year decline in 25 months.