In order to enhance the underslanding of the occurrence probability of freak waves in coastal areas, using wave data from nine stations in the sea area around Korea in 2009, the occurrence probability of freak waves in Korean coastal areas and the relations between the occurrence probability and three parameters, the effective wave pressure height, season, and water depth, were examined based on the definition of freak waves using wave pressure data. The results show that the occurrence probability of freak waves in Korean coastal areas is close to the predicted value of the Rayleigh distribution and does not vary with the effective wave pressure height and water depth, while the time of frequent occurrence of freak waves changes with the station location. There is no obvious correlation between the occurrence of freak waves in Korean coastal areas and the effective wave pressure height, water depth, and season.