Kwaksan County is a kun (, 'county') in coastal southern North P'yà Ângan province, North Korea. It faces the Yellow Sea to the south. By land, it is bordered by Kusà Âng city to the north, Chà Ângju to the east, and Sà Ânch'à Ân to the west.
Numerous small rivers meet the sea in Kwaksan, including the Tongrae, Sasà Âng, and Sach'à Ân (). There are 15 islands off the coast, which measures in total. Forestland occupies 46.5% of the county's area, and is 80% pine; cultivated land occupies 30% of the area, and is 50% rice paddies.
Kwaksan county is divided into 1 Ã Âp (town) and 19 ri (villages):
The year-round average temperature is , with a January mean of and an August average of . The average annual rainfall is .
The chief crops are rice, maize, apples, and peaches. Silkworms and livestock are also raised, and fishing also contributes to the local economy.
The P'yà Ângà Âi Line of the Korean State Railway passes through the county on its way between P'yà Ângyang and Sinà Âiju.
Local attractions include a five-story stone pagoda dating from the Koryà  period in Wà Ânha-ri, and the Rà Ângsan fortress (), established in 996 by the general Sà  Hà Âi.
The only institution of higher learning in the county is a technical school.