The Sinhà Âng Line is an electrified narrow gauge railway line of the Korean State Railway in South Hamgyà Âng Province, North Korea, running from Hamhà Âng (Hamhà Âng-si) to Pujà Ânhoban (Pujà Ân-gun) on Lake Pujà Ân via Sinhà Âng (Sinhà Âng-gun).
Between Hamhà Âng and Sinhà Âng, a distance of , the line is standard gauge, but the remaining from Sinhà Âng to the terminus at Pujà Ânhoban is narrow gauge; the narrow gauge section is also electrified.
Though primarily an industrial railway connecting to the Pujà Ân River hydroelectric power plant, it also plays an important role in passenger transportation in the region. There is a section between Songhà Âng and Pujà Âllyà Âng that is cable-hauled.
During the Japanese colonial era, the privately owned Sinhà Âng Railway built a network of narrow-gauge lines north of Hamhà Âng. These were the Hamnam Line (not to be confused with the line of the same name of the Chosen Magnesite Development Railway, nowadays called Kà Âmgol Line), to assist in the construction of the Pujà Ân River hydroelectric power plant and to exploit forestry and other resources in the area. When complete, the Hamnam Line ran from Hamhà Âng to Hamnam Sinhà Âng (nowadays called simply Sinhà Âng) via Oro (nowadays Yà Ânggwang), with a branch from Oro to Sang'tong. Later, the Sinhà Âng Railway opened the Songhà Âng Line from Sinhà Âng to Pujà Ânhoban. The Sinhà Âng Railway was bought by the Chosen Railway on 22 April 1938.
Between 1934 and 1936, the Sinhà Âng Railway opened a line south from Hamhà Âng, the Namhà Âng Line.
After the establishment of the DPRK and the nationalisation of its railways, the Hamnam Line was split up, with the Hamhà Âng - Oro - Sinhà Âng section becoming the Sinhà Âng Line, and the Oro - Sangt'ong section becoming part of the Changjin Line. At the same time, the Songhà Âng Line was merged into the Sinhà Âng Line, extending it to its current length. Originally built entirely as a narrow gauge line, frequent accidents on the line led the Korean State Railway to convert the Hamhà ÂngâÂÂSinhà Âng to standard gauge for greater safety and increased transportation capacity. After the regauging of this section, West Hamhà Âng station was disconnected from the Hamhà ÂngâÂÂSinhà Âng, leaving Hamhà Âng as the only direct junction point with the Sà Âho Line. Electrification of the line to Pujà Ânhoban was completed in 1992.
The primary outbound freight shipped on the Sinhà Âng Line is wood; potatoes and metals are also shipped out. Goods arriving onto the line from elsewhere include coal (anthracite and bituminous), fertiliser, aquatic products, grains and cement.
Though primarily an industrial railway connecting to the Pujà Ân River hydroelectric power plant, it also plays an important role in passenger transportation in the region. A pair of local passenger trains, 880/881, operate on the standard gauge section of this line between Hamhà Âng and Sinhà Âng; there are also passenger trains on the narrow-gauge section north of Sinhà Âng.
A yellow background in the "Distance" box indicates that section of the line is not electrified; a pink background indicates that section is narrow gauge; an orange background indicates that section is non-electrified narrow gauge.