Tongsin is a kun

Administrative divisions of North Korea

The administrative divisions of North Korea are organized into three hierarchical levels. Many of the units have equivalents in the system of South Korea. At the highest level are nine provinces, two directly governed cities, and three special administrative divisions. The second-level divisions...

, or county, in southern Chagang province, North Korea

North Korea

The Democratic People’s Republic of Korea , , is a country in East Asia, occupying the northern half of the Korean Peninsula. Its capital and largest city is Pyongyang. The Korean Demilitarized Zone serves as the buffer zone between North Korea and South Korea...

. It borders Ryongrim

Ryongrim

Ryongrim is a kun, or county, in southeastern Chagang Province, North Korea. It borders Rangrim, Changjin, Chonchon, Tongsin, Taehung, and Songgan counties. The county is mainly alpine territory...

 and Chonchon

Chonchon (North Korea)

For other uses, see Chonchon Chonchon is a kun, or county, in central Chagang province, North Korea. Originally part of Kanggye, it was made a separate county in 1949. The terrain is high and mountainous; the highest point is Sungjoksan, 1984 m above sea level...

 to the north, the counties of Taehung

Taehung

Taehung is a kun, or county, in the northeastern corner of South Pyongan province, North Korea. It is bordered to the north by Yongrim and Changjin, to the east by Yonggwang and Hamju, to the south by Yodok and Chongpyong, and to the west by Yongwon and Tongsin...

 and Yongwon in South Pyongan to the south and east, and Huichon

Huichon

Hŭich'ŏn is a city in the southern part of Chagang Province, North Korea. The population is 163,000 .-History:Hŭich'ŏn was formerly a small village, since the Korean War and an influx of government investment, it has become a base for electronics and machinery production for...

 and Songwon

Songwon

Songwon is a kun, or county, in southwestern Chagang province, North Korea. It borders Usi and Kopung counties to the north, Tongsin to the east, and Huichon to the south, as well as North Pyongan's Tongchang county to the west...

 to the west and southwest. Originally part of Huichon

Huichon

Hŭich'ŏn is a city in the southern part of Chagang Province, North Korea. The population is 163,000 .-History:Hŭich'ŏn was formerly a small village, since the Korean War and an influx of government investment, it has become a base for electronics and machinery production for...

, it was created in 1952 as part of a general reorganization of local government.

The valley of the Chongchon River lies in western Tongsin. High mountains rise on all other sides, with the Myohyang Mountains in the south and the Chogyuryong Mountains in the north and east; spurs and outliers of these ranges cover most of the county. The highest point is Ungosusan (웅어수산, 2020 m).

Agriculture and logging are the chief local industries. 13% of Tongsin's land is arable, and most of the remaining 87% is forested. Maize is the principal crop. There are no rail lines in the county, but roads tie it to nearby Huichon and Ryonggang

Ryonggang

Ryonggang-kun is a county in South Pyongan province, North Korea. It is administered as a part of Namp'o. It is famous for its local apples.-Administrative divisions:Ryonggang-kun is divided into one town and several villages ....

, with a bus service operating between Tongsin and Huichon.