(until 1946, Insterburg), a city under oblast jurisdiction and administrative center of Cherniakhovsk Raion, Kaliningrad Oblast, RSFSR. Situated at the confluence of the Instruch and Angrapa rivers, which form the Pregolia River. Population, 34,000 (1974).
Cherniakhovsk is a railroad junction with lines to Kaliningrad, Sovetsk, Kaunas, and Zheleznodorozhnyi and is also a highway junction. Among the industrial enterprises in Cherniakhovsk are the Tekhmash Plant, a leather plant, a ceramic plant, a motor-vehicle repair shop, a wood-products combine, and a logging and timber distribution establishment. The city’s food industry includes a meat-packing plant, a milk plant, and a confectionery factory. The city has a pedagogical school. Cherniakhovsk was named in honor of General of the Army I. D. Cherniakhovskii.