As of September 21, 2023, the current population of South Korea is estimated to be 51,771,944 people according to Worldometer. Other sources such as World Population Review, MacroTrends, Trading Economics, and Countrymeters also estimate the population of South Korea to be around 51.7 to 51.8 million people in 2023. Therefore, the population of South Korea in 2023 is estimated to be around 51.7 to 51.8 million people.