Sariwŏn is a city in North Korea. It is the capital and largest city of North Hwanghae Province. The city's population as of 2008 is 307,764. Sar…Sariwŏn is a city in North Korea. It is the capital and largest city of North Hwanghae Province. The city's population as of 2008 is 307,764. Sariwŏn has the only pediatric hospital in the entire region; it serves 16 districts and 500,000 children and teens annually.